CVE-2021-39935

Exploitation

Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2026-02-03. Federal remediation due 2026-02-24.

SSVC decision

• ExploitationactiveCISA reports credible evidence of active exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

36.14% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 98.4% of scored records. A rank, not a probability.

NVD base score

7.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-12-13 15:47Z4 YR AGO

Last updated

2026-02-03 17:20Z8 MO AGO

Reserved

2021-08-23

Assigning CNA

GitLab

Record state

PUBLISHED

Severity

Medium (CVSS 6.8)

CNA CVSS vector

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

Weaknesses

• CWE-918Server-Side Request Forgery (SSRF)Base

Data version

5.2

Document digest

a63d0fd7dc9f07a1755030e1111e9e2c1c90765a053dee9be290874f60525cda

• gitlab.comhttps://gitlab.com/gitlab-org/gitlab/-/issues/346187x_refsource_MISC
• hackerone.comhttps://hackerone.com/reports/1236965x_refsource_MISC
• gitlab.comhttps://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39935.jsonx_refsource_CONFIRM
• www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-39935government-resource