Vulnerability-Lookup

CVE-2021-21684 (GCVE-0-2021-21684)

Vulnerability from cvelistv5 – Published: 2021-10-06 22:10 – Updated: 2024-08-03 18:23

Summary

Jenkins Git Plugin 4.8.2 and earlier does not escape the Git SHA-1 checksum parameters provided to commit notifications when displaying them in a build cause, resulting in a stored cross-site scripting (XSS) vulnerability.

Severity

6.1 (Medium)


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

Assigner

jenkins mitre root

References

2 references

URL	Tags
https://www.jenkins.io/security/advisory/2021-10-…	x_refsource_CONFIRM
http://www.openwall.com/lists/oss-security/2021/10/06/1	mailing-listx_refsource_MLIST

Impacted products

1 product

Vendor	Product	Version	CPE status
Jenkins project	Jenkins Git Plugin	Affected: unspecified , ≤ 4.8.2 (custom) Unaffected: 4.7.1.1 Unaffected: 4.3.1	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2021-21684

Vulnerability from fkie_nvd - Published: 2021-10-06 23:15 - Updated: 2026-06-17 03:35

Severity

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

Summary

References

URL	Tags
jenkinsci-cert@googlegroups.com	http://www.openwall.com/lists/oss-security/2021/10/06/1	Mailing List, Third Party Advisory
jenkinsci-cert@googlegroups.com	https://www.jenkins.io/security/advisory/2021-10-06/#SECURITY-2499	Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2021/10/06/1	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://www.jenkins.io/security/advisory/2021-10-06/#SECURITY-2499	Vendor Advisory

Impacted products

	Vendor	Product	Version
	jenkins	git	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "Jenkins Git Plugin",
          "vendor": "Jenkins project",
          "versions": [
            {
              "lessThanOrEqual": "4.8.2",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            },
            {
              "status": "unaffected",
              "version": "4.7.1.1"
            },
            {
              "status": "unaffected",
              "version": "4.3.1"
            }
          ]
        }
      ],
      "source": "jenkinsci-cert@googlegroups.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:jenkins:git:*:*:*:*:*:jenkins:*:*",
              "matchCriteriaId": "0FF494B4-1102-4B55-8842-6D07058B3D2D",
              "versionEndIncluding": "4.8.2",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Jenkins Git Plugin 4.8.2 and earlier does not escape the Git SHA-1 checksum parameters provided to commit notifications when displaying them in a build cause, resulting in a stored cross-site scripting (XSS) vulnerability."
    },
    {
      "lang": "es",
      "value": "El plugin Git de Jenkins versiones 4.8.2 y anteriores, no escapa a los par\u00e1metros de suma de comprobaci\u00f3n Git SHA-1 proporcionados a las notificaciones de commit cuando se muestran en una causa de construcci\u00f3n, resultando en una vulnerabilidad de tipo cross-site scripting (XSS) almacenado"
    }
  ],
  "id": "CVE-2021-21684",
  "lastModified": "2026-06-17T03:35:59.590",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": true
      }
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    "cvssMetricV31": [
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          "attackComplexity": "LOW",
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          "confidentialityImpact": "LOW",
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          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
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          "version": "3.1"
        },
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        "impactScore": 2.7,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  },
  "published": "2021-10-06T23:15:06.977",
  "references": [
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      "source": "jenkinsci-cert@googlegroups.com",
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        "Mailing List",
        "Third Party Advisory"
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    },
    {
      "source": "jenkinsci-cert@googlegroups.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.jenkins.io/security/advisory/2021-10-06/#SECURITY-2499"
    },
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  "vulnStatus": "Modified",
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}

GHSA-GGHC-G8CJ-4VFV

Vulnerability from github – Published: 2022-05-24 19:16 – Updated: 2023-10-27 16:02

Summary

Stored XSS vulnerability in Jenkins Git Plugin

Details

Jenkins Git Plugin 4.8.2 and earlier does not escape the Git SHA-1 checksum parameters provided to commit notifications when displaying them in a build cause.

This results in a stored cross-site scripting (XSS) vulnerability exploitable by attackers able to submit crafted commit notifications to the /git/notifyCommit endpoint.

Jenkins Git Plugin 4.8.3 rejects Git SHA-1 checksum parameters that do not match the expected format. Existing values are sanitized when displayed on the UI.

This vulnerability is only exploitable in Jenkins 2.314 and earlier, LTS 2.303.1 and earlier. See the LTS upgrade guide.

Severity

6.1 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 4.8.2"
      },
      "package": {
        "ecosystem": "Maven",
        "name": "org.jenkins-ci.plugins:git"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.8.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-21684"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-116",
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-12-15T17:36:30Z",
    "nvd_published_at": "2021-10-06T23:15:00Z",
    "severity": "MODERATE"
  },
  "details": "Jenkins Git Plugin 4.8.2 and earlier does not escape the Git SHA-1 checksum parameters provided to commit notifications when displaying them in a build cause.\n\nThis results in a stored cross-site scripting (XSS) vulnerability exploitable by attackers able to submit crafted commit notifications to the `/git/notifyCommit` endpoint.\n\nJenkins Git Plugin 4.8.3 rejects Git SHA-1 checksum parameters that do not match the expected format. Existing values are sanitized when displayed on the UI.\n\nThis vulnerability is only exploitable in Jenkins 2.314 and earlier, LTS 2.303.1 and earlier. See the [LTS upgrade guide](https://www.jenkins.io/doc/upgrade-guide/2.303/#SECURITY-2452).",
  "id": "GHSA-gghc-g8cj-4vfv",
  "modified": "2023-10-27T16:02:41Z",
  "published": "2022-05-24T19:16:59Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-21684"
    },
    {
      "type": "WEB",
      "url": "https://github.com/jenkinsci/git-plugin/commit/5474cc942bfba60927be629ff47fb41c38c66741"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/jenkinsci/git-plugin"
    },
    {
      "type": "WEB",
      "url": "https://www.jenkins.io/security/advisory/2021-10-06/#SECURITY-2499"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2021/10/06/1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Stored XSS vulnerability in Jenkins Git Plugin"
}

GSD-2021-21684

Vulnerability from gsd - Updated: 2023-12-13 01:23

Details

Aliases

CVE-2021-21684

Aliases

CVE-2021-21684

JSON

To clipboard

{
  "GSD": {
    "alias": "CVE-2021-21684",
    "description": "Jenkins Git Plugin 4.8.2 and earlier does not escape the Git SHA-1 checksum parameters provided to commit notifications when displaying them in a build cause, resulting in a stored cross-site scripting (XSS) vulnerability.",
    "id": "GSD-2021-21684",
    "references": [
      "https://access.redhat.com/errata/RHSA-2022:0055"
    ]
  },
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      "publishedDate": "2021-10-06T23:15Z"
    }
  }
}

RHSA-2022:0055

Vulnerability from csaf_redhat - Published: 2022-03-10 14:59 - Updated: 2026-08-19 20:46

Summary

Red Hat Security Advisory: OpenShift Container Platform 4.10.3 bug fix and security update

Severity

Moderate

Scope

24 vulnerabilities in this advisory, including CVE-2021-21684.

CVE-2021-21684

A stored cross-site scripting (XSS) vulnerability was found in the Jenkins Git plugin. Due to not escaping the Git SHA-1 checksum parameters provided to commit notifications, an attacker is able to submit crafted commit notifications to the `/git/notifyCommit` endpoint.

6.1 (Medium)


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

Fixed: 2 products Known not affected: 550 products

https://access.redhat.com/errata/RHSA-2022:0055

Open the full advisory

RHSA-2022_0055

Vulnerability from csaf_redhat - Published: 2022-03-10 14:59 - Updated: 2024-12-17 21:53

Summary

Red Hat Security Advisory: OpenShift Container Platform 4.10.3 bug fix and security update

Severity

Moderate

Scope

7 vulnerabilities in this advisory, including CVE-2021-21684.

CVE-2021-21684

6.1 (Medium)


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

Fixed: 2 products Known not affected: 550 products

https://access.redhat.com/errata/RHSA-2022:0055

Open the full advisory

WID-SEC-W-2023-0432

Vulnerability from csaf_certbund - Published: 2021-10-06 22:00 - Updated: 2023-02-20 23:00

Summary

Jenkins: Mehrere Schwachstellen

Severity

Mittel

Scope

4 vulnerabilities in this advisory, including CVE-2021-21684.

CVE-2021-21684

In Jenkins existieren mehrere Schwachstellen. Die Schwachstellen bestehen im Jenkins Core sowie in verschiedenen Plugins. Ein entfernter, anonymer Angreifer kann diese Schwachstellen ausnutzen, um Sicherheitsvorkehrungen zu umgehen, Informationen offenzulegen oder einen Cross-Site-Scripting-Angriff durchzuführen. Zur erfolgreichen Ausnutzung einiger dieser Schwachstellen ist eine Benutzeraktion erforderlich.

Known affected: 3 products

Open the full advisory

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-2021-21684 (GCVE-0-2021-21684)

FKIE_CVE-2021-21684

GHSA-GGHC-G8CJ-4VFV

GSD-2021-21684

RHSA-2022:0055

RHSA-2022_0055

WID-SEC-W-2023-0432

Tags

Sightings

Nomenclature

Related by attack behaviour