Vulnerability-Lookup

CVE-2026-8873 (GCVE-0-2026-8873)

Vulnerability from cvelistv5 – Published: 2026-05-27 05:31 – Updated: 2026-05-27 10:34

Title

Content Slideshow <= 2.4.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes

Summary

The Content Slideshow plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Shortcode Attributes in all versions up to, and including, 2.4.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Severity

6.4 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-27 10:21 UTC

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

Wordfence mitre root

References

3 references

URL	Tags
https://www.wordfence.com/threat-intel/vulnerabil…
https://plugins.trac.wordpress.org/browser/conten…
https://plugins.trac.wordpress.org/browser/conten…

Impacted products

1 product

Vendor	Product	Version	CPE status
celloexpressions	Content Slideshow	Affected: 0 , ≤ 2.4.1 (semver)	guessed

Credits

Gilang Asra Bilhadi

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-8873",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-27T10:21:50.868509Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-27T10:34:31.750Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Content Slideshow",
          "vendor": "celloexpressions",
          "versions": [
            {
              "lessThanOrEqual": "2.4.1",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Gilang Asra Bilhadi"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The Content Slideshow plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Shortcode Attributes in all versions up to, and including, 2.4.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 6.4,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79 Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-27T05:31:28.415Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/9548f647-9fcb-481c-874e-0184609283fe?source=cve"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/content-slideshow/tags/2.4.1/slideshow-widget-shortcode.php#L143"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/content-slideshow/tags/2.4.1/slideshow-widget-shortcode.php#L14"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-05-26T17:26:05.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "Content Slideshow \u003c= 2.4.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-8873",
    "datePublished": "2026-05-27T05:31:28.415Z",
    "dateReserved": "2026-05-18T20:25:19.065Z",
    "dateUpdated": "2026-05-27T10:34:31.750Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-8873",
      "date": "2026-09-16",
      "epss": "0.00187",
      "percentile": "0.08531"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-8873\",\"sourceIdentifier\":\"security@wordfence.com\",\"published\":\"2026-05-27T07:16:16.890\",\"lastModified\":\"2026-06-17T11:04:33.197\",\"vulnStatus\":\"Deferred\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"The Content Slideshow plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Shortcode Attributes in all versions up to, and including, 2.4.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.\"}],\"affected\":[{\"source\":\"security@wordfence.com\",\"affectedData\":[{\"vendor\":\"celloexpressions\",\"product\":\"Content Slideshow\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"0\",\"lessThanOrEqual\":\"2.4.1\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security@wordfence.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N\",\"baseScore\":6.4,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.1,\"impactScore\":2.7}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-05-27T10:21:50.868509Z\",\"id\":\"CVE-2026-8873\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"security@wordfence.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-79\"}]}],\"references\":[{\"url\":\"https://plugins.trac.wordpress.org/browser/content-slideshow/tags/2.4.1/slideshow-widget-shortcode.php#L14\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/browser/content-slideshow/tags/2.4.1/slideshow-widget-shortcode.php#L143\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://www.wordfence.com/threat-intel/vulnerabilities/id/9548f647-9fcb-481c-874e-0184609283fe?source=cve\",\"source\":\"security@wordfence.com\"}]}}",
    "redhat_vex": {
      "current_release_date": "2026-06-05T19:24:03+00:00",
      "cve": "CVE-2026-8873",
      "id": "CVE-2026-8873",
      "initial_release_date": "2026-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "Content Slideshow \u003c= 2.4.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8873.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-8873\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-05-27T10:21:50.868509Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-05-27T10:34:26.645Z\"}}], \"cna\": {\"title\": \"Content Slideshow \u003c= 2.4.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes\", \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Gilang Asra Bilhadi\"}], \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 6.4, \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N\"}}], \"affected\": [{\"vendor\": \"celloexpressions\", \"product\": \"Content Slideshow\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"2.4.1\"}], \"defaultStatus\": \"unaffected\"}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2026-05-26T17:26:05.000Z\", \"value\": \"Disclosed\"}], \"references\": [{\"url\": \"https://www.wordfence.com/threat-intel/vulnerabilities/id/9548f647-9fcb-481c-874e-0184609283fe?source=cve\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/content-slideshow/tags/2.4.1/slideshow-widget-shortcode.php#L143\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/content-slideshow/tags/2.4.1/slideshow-widget-shortcode.php#L14\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"The Content Slideshow plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Shortcode Attributes in all versions up to, and including, 2.4.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-79\", \"description\": \"CWE-79 Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"b15e7b5b-3da4-40ae-a43c-f7aa60e62599\", \"shortName\": \"Wordfence\", \"dateUpdated\": \"2026-05-27T05:31:28.415Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-8873\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-27T10:34:31.750Z\", \"dateReserved\": \"2026-05-18T20:25:19.065Z\", \"assignerOrgId\": \"b15e7b5b-3da4-40ae-a43c-f7aa60e62599\", \"datePublished\": \"2026-05-27T05:31:28.415Z\", \"assignerShortName\": \"Wordfence\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

CNVD-2026-25432

Vulnerability from cnvd - Published: 2026-06-26

Title

WordPress插件Content Slideshow跨站脚本漏洞

Description

WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress插件Content Slideshow存在跨站脚本漏洞，该漏洞源于应用对用户提供的数据缺乏有效过滤与转义，攻击者可利用该漏洞在页面中注入任意web脚本。

Severity

中

Formal description

厂商尚未提供漏洞修复方案，请关注厂商主页更新： https://wordpress.org/plugins/content-slideshow/

Reference

https://nvd.nist.gov/vuln/detail/CVE-2026-8873

Impacted products

Name
WordPress Content Slideshow plugin <=2.4.1

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-8873",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-8873"
    }
  },
  "description": "WordPress\u662f\u4e00\u5957\u4f7f\u7528PHP\u8bed\u8a00\u5f00\u53d1\u7684\u535a\u5ba2\u5e73\u53f0\u3002\u8be5\u5e73\u53f0\u5177\u6709\u5728\u57fa\u4e8ePHP\u548cMySQL\u7684\u670d\u52a1\u5668\u4e0a\u67b6\u8bbe\u4e2a\u4eba\u535a\u5ba2\u7f51\u7ad9\u7684\u529f\u80fd\u3002WordPress plugin\u662f\u4e00\u4e2a\u5e94\u7528\u63d2\u4ef6\u3002\n\nWordPress\u63d2\u4ef6Content Slideshow\u5b58\u5728\u8de8\u7ad9\u811a\u672c\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5e94\u7528\u5bf9\u7528\u6237\u63d0\u4f9b\u7684\u6570\u636e\u7f3a\u4e4f\u6709\u6548\u8fc7\u6ee4\u4e0e\u8f6c\u4e49\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5728\u9875\u9762\u4e2d\u6ce8\u5165\u4efb\u610fweb\u811a\u672c\u3002",
  "formalWay": "\u5382\u5546\u5c1a\u672a\u63d0\u4f9b\u6f0f\u6d1e\u4fee\u590d\u65b9\u6848\uff0c\u8bf7\u5173\u6ce8\u5382\u5546\u4e3b\u9875\u66f4\u65b0\uff1a\r\nhttps://wordpress.org/plugins/content-slideshow/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-25432",
  "openTime": "2026-06-26",
  "products": {
    "product": "WordPress Content Slideshow plugin \u003c=2.4.1"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2026-8873",
  "serverity": "\u4e2d",
  "submitTime": "2026-05-29",
  "title": "WordPress\u63d2\u4ef6Content Slideshow\u8de8\u7ad9\u811a\u672c\u6f0f\u6d1e"
}

FKIE_CVE-2026-8873

Vulnerability from fkie_nvd - Published: 2026-05-27 07:16 - Updated: 2026-06-17 11:04

Severity

6.4 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Summary

References

	URL	Tags
	security@wordfence.com	https://plugins.trac.wordpress.org/browser/content-slideshow/tags/2.4.1/slideshow-widget-shortcode.php#L14
	security@wordfence.com	https://plugins.trac.wordpress.org/browser/content-slideshow/tags/2.4.1/slideshow-widget-shortcode.php#L143
	security@wordfence.com	https://www.wordfence.com/threat-intel/vulnerabilities/id/9548f647-9fcb-481c-874e-0184609283fe?source=cve

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Content Slideshow",
          "vendor": "celloexpressions",
          "versions": [
            {
              "lessThanOrEqual": "2.4.1",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@wordfence.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Content Slideshow plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Shortcode Attributes in all versions up to, and including, 2.4.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page."
    }
  ],
  "id": "CVE-2026-8873",
  "lastModified": "2026-06-17T11:04:33.197",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.4,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 2.7,
        "source": "security@wordfence.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-8873",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-05-27T10:21:50.868509Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-05-27T07:16:16.890",
  "references": [
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/content-slideshow/tags/2.4.1/slideshow-widget-shortcode.php#L14"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/content-slideshow/tags/2.4.1/slideshow-widget-shortcode.php#L143"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/9548f647-9fcb-481c-874e-0184609283fe?source=cve"
    }
  ],
  "sourceIdentifier": "security@wordfence.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "security@wordfence.com",
      "type": "Secondary"
    }
  ]
}

GHSA-M2JJ-4C8G-XGJ3

Vulnerability from github – Published: 2026-05-27 09:31 – Updated: 2026-05-27 09:31

Details

Severity

6.4 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-8873"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-27T07:16:16Z",
    "severity": "MODERATE"
  },
  "details": "The Content Slideshow plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Shortcode Attributes in all versions up to, and including, 2.4.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.",
  "id": "GHSA-m2jj-4c8g-xgj3",
  "modified": "2026-05-27T09:31:13Z",
  "published": "2026-05-27T09:31:13Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-8873"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/content-slideshow/tags/2.4.1/slideshow-widget-shortcode.php#L14"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/content-slideshow/tags/2.4.1/slideshow-widget-shortcode.php#L143"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/9548f647-9fcb-481c-874e-0184609283fe?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-8873 (GCVE-0-2026-8873)

CNVD-2026-25432

FKIE_CVE-2026-8873

GHSA-M2JJ-4C8G-XGJ3

Tags

Sightings

Nomenclature

Related by attack behaviour