Vulnerability-Lookup

GHSA-GF5W-3F8W-9FM6

Vulnerability from github – Published: 2026-06-24 00:30 – Updated: 2026-06-24 00:30

Details

FlatPress versions prior to commit 10be83c, contains a stored cross-site scripting vulnerability in comment and contact forms where name, URL, and email fields are rendered without proper output encoding in Smarty templates. Attackers can inject arbitrary HTML and JavaScript through these fields to execute malicious scripts in browsers of viewers including administrators, or bypass URL scheme validation to inject javascript: or data: URIs.

Severity

8.2 (High)


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

8.4 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-56785"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-23T23:16:50Z",
    "severity": "HIGH"
  },
  "details": "FlatPress versions prior to commit 10be83c, contains a stored cross-site scripting vulnerability in comment and contact forms where name, URL, and email fields are rendered without proper output encoding in Smarty templates. Attackers can inject arbitrary HTML and JavaScript through these fields to execute malicious scripts in browsers of viewers including administrators, or bypass URL scheme validation to inject javascript: or data: URIs.",
  "id": "GHSA-gf5w-3f8w-9fm6",
  "modified": "2026-06-24T00:30:31Z",
  "published": "2026-06-24T00:30:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56785"
    },
    {
      "type": "WEB",
      "url": "https://github.com/flatpressblog/flatpress/commit/10be83cbaac5ce0e51250b9d57de7f257b8f34f8"
    },
    {
      "type": "WEB",
      "url": "https://github.com/dilipk5/flatpressd-cms-sxss"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/flatpress-stored-cross-site-scripting-via-unescaped-comment-and-contact-form-fields"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-56785 (GCVE-0-2026-56785)

Vulnerability from cvelistv5 – Published: 2026-06-23 22:09 – Updated: 2026-06-24 13:36

Title

FlatPress - Stored Cross-Site Scripting via Unescaped Comment and Contact Form Fields

Summary

FlatPress contains a stored cross-site scripting vulnerability in comment and contact forms where name, URL, and email fields are rendered without proper output encoding in Smarty templates. Attackers can inject arbitrary HTML and JavaScript through these fields to execute malicious scripts in browsers of viewers including administrators, or bypass URL scheme validation to inject javascript: or data: URIs.

Severity

8.4 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N

8.2 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

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

Assigner

VulnCheck

References

3 references

URL	Tags
https://github.com/flatpressblog/flatpress/commit…	patch
https://github.com/dilipk5/flatpressd-cms-sxss	vendor-advisory
https://www.vulncheck.com/advisories/flatpress-st…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
FlatPress	FlatPress	Affected: 0 , < 10be83c (custom)

Date Public

2026-04-15 00:00

Credits

Dilipkumar Choudhary Dilipkumar Choudhary Fraenkiman

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-56785",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-24T13:05:10.684705Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-24T13:05:18.263Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "FlatPress",
          "vendor": "FlatPress",
          "versions": [
            {
              "lessThan": "10be83c",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:flatpress:flatpress:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "*",
                  "vulnerable": true
                }
              ],
              "operator": "OR"
            }
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      ],
      "credits": [
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          "lang": "en",
          "type": "finder",
          "value": "Dilipkumar Choudhary"
        },
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          "type": "reporter",
          "value": "Dilipkumar Choudhary"
        },
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          "type": "remediation developer",
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        }
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      "datePublic": "2026-04-15T00:00:00.000Z",
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            }
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      "metrics": [
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          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
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            "exploitMaturity": "NOT_DEFINED",
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            "subConfidentialityImpact": "HIGH",
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          "url": "https://github.com/flatpressblog/flatpress/commit/10be83cbaac5ce0e51250b9d57de7f257b8f34f8"
        },
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          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/dilipk5/flatpressd-cms-sxss"
        },
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/flatpress-stored-cross-site-scripting-via-unescaped-comment-and-contact-form-fields"
        }
      ],
      "title": "FlatPress - Stored Cross-Site Scripting via Unescaped Comment and Contact Form Fields",
      "x_generator": {
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    }
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    "cveId": "CVE-2026-56785",
    "datePublished": "2026-06-23T22:09:35.831Z",
    "dateReserved": "2026-06-23T01:24:27.651Z",
    "dateUpdated": "2026-06-24T13:36:17.904Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Action not permitted

GHSA-GF5W-3F8W-9FM6

CVE-2026-56785 (GCVE-0-2026-56785)

Tags

Sightings

Nomenclature