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.
Published 2021-10-05 12:15:08
Updated 2021-10-08 19:02:49
Source GitLab Inc.
View at NVD,   CVE.org
Vulnerability category: Cross site scripting (XSS)

Exploit prediction scoring system (EPSS) score for CVE-2021-39887

Probability of exploitation activity in the next 30 days: 0.10%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 40 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2021-39887

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Source
3.5
LOW AV:N/AC:M/Au:S/C:N/I:P/A:N
6.8
2.9
nvd@nist.gov
7.3
HIGH CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
2.1
5.2
cve@gitlab.com
5.4
MEDIUM CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
2.3
2.7
nvd@nist.gov

CWE ids for CVE-2021-39887

References for CVE-2021-39887

Products affected by CVE-2021-39887

  • Gitlab » Gitlab » Community Edition
    Versions from including (>=) 8.4.0 and before (<) 14.1.7
    cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*
  • Gitlab » Gitlab » Enterprise Edition
    Versions from including (>=) 8.4.0 and before (<) 14.1.7
    cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*
  • Gitlab » Gitlab » Community Edition
    Versions from including (>=) 14.2 and before (<) 14.2.5
    cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*
  • Gitlab » Gitlab » Community Edition
    Versions from including (>=) 14.3 and before (<) 14.3.1
    cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*
  • Gitlab » Gitlab » Enterprise Edition
    Versions from including (>=) 14.2 and before (<) 14.2.5
    cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*
  • Gitlab » Gitlab » Enterprise Edition
    Versions from including (>=) 14.3 and before (<) 14.3.1
    cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*
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