CVE-2021-39887
Vulnerability from cvelistv5
Published
2021-10-05 11:12
Modified
2024-08-04 02:20
Severity ?
7.3 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Summary
A stored Cross-Site Scripting vulnerability in the GitLab Flavored Markdown in GitLab CE/EE version 8.4 and above allowed an attacker to execute arbitrary JavaScript code on the victim's behalf.
References
cve@gitlab.comhttps://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39887.jsonVendor Advisory
cve@gitlab.comhttps://gitlab.com/gitlab-org/gitlab/-/issues/332903Broken Link
cve@gitlab.comhttps://hackerone.com/reports/1218174Permissions Required, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39887.jsonVendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://gitlab.com/gitlab-org/gitlab/-/issues/332903Broken Link
af854a3a-2127-422b-91ae-364da2661108https://hackerone.com/reports/1218174Permissions Required, Third Party Advisory
Impacted products
Vendor Product Version
GitLab GitLab Version: >=8.4, <14.1.7
Version: >=14.2, <14.2.5
Version: >=14.3, <14.3.1
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
   containers: {
      adp: [
         {
            providerMetadata: {
               dateUpdated: "2024-08-04T02:20:33.689Z",
               orgId: "af854a3a-2127-422b-91ae-364da2661108",
               shortName: "CVE",
            },
            references: [
               {
                  tags: [
                     "x_refsource_MISC",
                     "x_transferred",
                  ],
                  url: "https://gitlab.com/gitlab-org/gitlab/-/issues/332903",
               },
               {
                  tags: [
                     "x_refsource_MISC",
                     "x_transferred",
                  ],
                  url: "https://hackerone.com/reports/1218174",
               },
               {
                  tags: [
                     "x_refsource_CONFIRM",
                     "x_transferred",
                  ],
                  url: "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39887.json",
               },
            ],
            title: "CVE Program Container",
         },
      ],
      cna: {
         affected: [
            {
               product: "GitLab",
               vendor: "GitLab",
               versions: [
                  {
                     status: "affected",
                     version: ">=8.4, <14.1.7",
                  },
                  {
                     status: "affected",
                     version: ">=14.2, <14.2.5",
                  },
                  {
                     status: "affected",
                     version: ">=14.3, <14.3.1",
                  },
               ],
            },
         ],
         credits: [
            {
               lang: "en",
               value: "Thanks saleemrashid for reporting this vulnerability through our HackerOne bug bounty program",
            },
         ],
         descriptions: [
            {
               lang: "en",
               value: "A stored Cross-Site Scripting vulnerability in the GitLab Flavored Markdown in GitLab CE/EE version 8.4 and above allowed an attacker to execute arbitrary JavaScript code on the victim's behalf.",
            },
         ],
         metrics: [
            {
               cvssV3_1: {
                  attackComplexity: "LOW",
                  attackVector: "NETWORK",
                  availabilityImpact: "NONE",
                  baseScore: 7.3,
                  baseSeverity: "HIGH",
                  confidentialityImpact: "HIGH",
                  integrityImpact: "HIGH",
                  privilegesRequired: "LOW",
                  scope: "UNCHANGED",
                  userInteraction: "REQUIRED",
                  vectorString: "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N",
                  version: "3.1",
               },
            },
         ],
         problemTypes: [
            {
               descriptions: [
                  {
                     description: "Improper neutralization of input during web page generation ('cross-site scripting') in GitLab",
                     lang: "en",
                     type: "text",
                  },
               ],
            },
         ],
         providerMetadata: {
            dateUpdated: "2021-10-05T11:12:11",
            orgId: "ceab7361-8a18-47b1-92ba-4d7d25f6715a",
            shortName: "GitLab",
         },
         references: [
            {
               tags: [
                  "x_refsource_MISC",
               ],
               url: "https://gitlab.com/gitlab-org/gitlab/-/issues/332903",
            },
            {
               tags: [
                  "x_refsource_MISC",
               ],
               url: "https://hackerone.com/reports/1218174",
            },
            {
               tags: [
                  "x_refsource_CONFIRM",
               ],
               url: "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39887.json",
            },
         ],
         x_legacyV4Record: {
            CVE_data_meta: {
               ASSIGNER: "cve@gitlab.com",
               ID: "CVE-2021-39887",
               STATE: "PUBLIC",
            },
            affects: {
               vendor: {
                  vendor_data: [
                     {
                        product: {
                           product_data: [
                              {
                                 product_name: "GitLab",
                                 version: {
                                    version_data: [
                                       {
                                          version_value: ">=8.4, <14.1.7",
                                       },
                                       {
                                          version_value: ">=14.2, <14.2.5",
                                       },
                                       {
                                          version_value: ">=14.3, <14.3.1",
                                       },
                                    ],
                                 },
                              },
                           ],
                        },
                        vendor_name: "GitLab",
                     },
                  ],
               },
            },
            credit: [
               {
                  lang: "eng",
                  value: "Thanks saleemrashid for reporting this vulnerability through our HackerOne bug bounty program",
               },
            ],
            data_format: "MITRE",
            data_type: "CVE",
            data_version: "4.0",
            description: {
               description_data: [
                  {
                     lang: "eng",
                     value: "A stored Cross-Site Scripting vulnerability in the GitLab Flavored Markdown in GitLab CE/EE version 8.4 and above allowed an attacker to execute arbitrary JavaScript code on the victim's behalf.",
                  },
               ],
            },
            impact: {
               cvss: {
                  attackComplexity: "LOW",
                  attackVector: "NETWORK",
                  availabilityImpact: "NONE",
                  baseScore: 7.2,
                  baseSeverity: "HIGH",
                  confidentialityImpact: "HIGH",
                  integrityImpact: "HIGH",
                  privilegesRequired: "LOW",
                  scope: "UNCHANGED",
                  userInteraction: "REQUIRED",
                  vectorString: "AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N",
                  version: "3.1",
               },
            },
            problemtype: {
               problemtype_data: [
                  {
                     description: [
                        {
                           lang: "eng",
                           value: "Improper neutralization of input during web page generation ('cross-site scripting') in GitLab",
                        },
                     ],
                  },
               ],
            },
            references: {
               reference_data: [
                  {
                     name: "https://gitlab.com/gitlab-org/gitlab/-/issues/332903",
                     refsource: "MISC",
                     url: "https://gitlab.com/gitlab-org/gitlab/-/issues/332903",
                  },
                  {
                     name: "https://hackerone.com/reports/1218174",
                     refsource: "MISC",
                     url: "https://hackerone.com/reports/1218174",
                  },
                  {
                     name: "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39887.json",
                     refsource: "CONFIRM",
                     url: "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39887.json",
                  },
               ],
            },
         },
      },
   },
   cveMetadata: {
      assignerOrgId: "ceab7361-8a18-47b1-92ba-4d7d25f6715a",
      assignerShortName: "GitLab",
      cveId: "CVE-2021-39887",
      datePublished: "2021-10-05T11:12:11",
      dateReserved: "2021-08-23T00:00:00",
      dateUpdated: "2024-08-04T02:20:33.689Z",
      state: "PUBLISHED",
   },
   dataType: "CVE_RECORD",
   dataVersion: "5.1",
   "vulnerability-lookup:meta": {
      nvd: "{\"cve\":{\"id\":\"CVE-2021-39887\",\"sourceIdentifier\":\"cve@gitlab.com\",\"published\":\"2021-10-05T12:15:07.903\",\"lastModified\":\"2024-11-21T06:20:28.653\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A stored Cross-Site Scripting vulnerability in the GitLab Flavored Markdown in GitLab CE/EE version 8.4 and above allowed an attacker to execute arbitrary JavaScript code on the victim's behalf.\"},{\"lang\":\"es\",\"value\":\"Una vulnerabilidad de tipo Cross-Site Scripting almacenado en el GitLab Flavored Markdown en GitLab CE/EE versión 8.4 y superior, permitía a un atacante ejecutar código JavaScript arbitrario en nombre de la víctima\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"cve@gitlab.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N\",\"baseScore\":7.3,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"REQUIRED\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.1,\"impactScore\":5.2},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N\",\"baseScore\":5.4,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"REQUIRED\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.3,\"impactScore\":2.7}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:M/Au:S/C:N/I:P/A:N\",\"baseScore\":3.5,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"MEDIUM\",\"authentication\":\"SINGLE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"NONE\"},\"baseSeverity\":\"LOW\",\"exploitabilityScore\":6.8,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":true}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-79\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*\",\"versionStartIncluding\":\"8.4.0\",\"versionEndExcluding\":\"14.1.7\",\"matchCriteriaId\":\"43AA0053-AAD2-412F-A7A1-BF43BAEA0AAD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*\",\"versionStartIncluding\":\"8.4.0\",\"versionEndExcluding\":\"14.1.7\",\"matchCriteriaId\":\"88AA013C-438F-4CEB-9603-37A5F26BF17D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*\",\"versionStartIncluding\":\"14.2\",\"versionEndExcluding\":\"14.2.5\",\"matchCriteriaId\":\"A3352A07-9A5A-4CA9-B6F6-71BA3A1D4F9C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*\",\"versionStartIncluding\":\"14.2\",\"versionEndExcluding\":\"14.2.5\",\"matchCriteriaId\":\"CAAC78F3-28E1-4A0D-BA8A-78AE9393B988\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*\",\"versionStartIncluding\":\"14.3\",\"versionEndExcluding\":\"14.3.1\",\"matchCriteriaId\":\"A573FB75-1C20-4E3A-982C-2B422C95BED8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*\",\"versionStartIncluding\":\"14.3\",\"versionEndExcluding\":\"14.3.1\",\"matchCriteriaId\":\"D0EFF286-2716-472C-AB8E-47595940C0B3\"}]}]}],\"references\":[{\"url\":\"https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39887.json\",\"source\":\"cve@gitlab.com\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://gitlab.com/gitlab-org/gitlab/-/issues/332903\",\"source\":\"cve@gitlab.com\",\"tags\":[\"Broken Link\"]},{\"url\":\"https://hackerone.com/reports/1218174\",\"source\":\"cve@gitlab.com\",\"tags\":[\"Permissions Required\",\"Third Party Advisory\"]},{\"url\":\"https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39887.json\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://gitlab.com/gitlab-org/gitlab/-/issues/332903\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Broken Link\"]},{\"url\":\"https://hackerone.com/reports/1218174\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Permissions Required\",\"Third Party Advisory\"]}]}}",
   },
}


Log in or create an account to share your comment.

Security Advisory comment format.

This schema specifies the format of a comment related to a security advisory.

UUIDv4 of the comment
UUIDv4 of the Vulnerability-Lookup instance
When the comment was created originally
When the comment was last updated
Title of the comment
Description of the comment
The identifier of the vulnerability (CVE ID, GHSA-ID, PYSEC ID, etc.).



Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.