CVE-2021-39885 json
A Stored XSS in merge request creation page in all versions of Gitlab EE starting from 13.7 before 14.1.7, all versions starting from 14.2…
published 2021-10-04 5 y ago modified 2026-09-10 1 mo ago also BIT-gitlab-2021-39885 , EUVD-2021-26241
- cvss
- 8.7
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.1%
- EPSS 1.1% chance of exploitation in 30 days, percentile 66%
- public exploits
- 0
- none known
Summary
A Stored XSS in merge request creation page in all versions of Gitlab EE starting from 13.7 before 14.1.7, all versions starting from 14.2 before 14.2.5, and all versions starting from 14.3 before 14.3.1 allows an attacker to execute arbitrary JavaScript code on the victim's behalf via malicious approval rule names
Patch / fix
- bitnami gitlab 14.1.7, 14.2.5, 14.3.1
- gitlab gitlab 14.1.7, 14.2.5, 14.3.1
- gitlab gitlab_enterprise 14.1.7, 14.2.5, 14.3.1
Exploit prediction
1.13% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- gitlab.com https://gitlab.com/gitlab-org/gitlab/-/issues/341140 referenced PoC, tagged "exploit" by a source, unverified
- hackerone.com https://hackerone.com/reports/1342009 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N |
| NVD | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 3.5 | AV:N/AC:M/Au:S/C:N/I:P/A:N |
| OSV | 3.1 | 8.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | gitlab | >=13.7.0, <14.1.7 >=14.2.0, <14.2.5 >=14.3.0, <14.3.1 |
14.1.7 14.2.5 14.3.1 |
Affected products
- GitLab GitLab
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
-
gitlab.com
/gitlab-org/gitlab/-/issues/341140
exploit, issue-tracking, vendor-advisory, advisory
-
hackerone.com
/reports/1342009
exploit, permissions-required, third-party-advisory, advisory
-
gitlab.com
/gitlab-org/cves/-/blob/master/2021/CVE-2021-39885.json
vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-39885
web
Sources
- CVE List CVE-2021-39885
- NVD CVE-2021-39885
- OSV BIT-gitlab-2021-39885
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Enhance with deb and rpm package type records.