Unintended Proxy or Intermediary ('Confused Deputy') in GitLab

published 2025-02-12 last yr. modified 2026-09-08 2mo ago also BIT-gitlab-2024-9870 , EUVD-2025-4968

cvss: 4.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 33%
public exploits: 0; none known

An external service interaction vulnerability in GitLab EE affecting all versions from 15.11 prior to 17.6.5, 17.7 prior to 17.7.4, and 17.8 prior to 17.8.2 allows an attacker to send requests from the GitLab server to unintended services.

Patch / fix

fixed in 2

bitnami gitlab 17.8.2
GitLab GitLab 17.6.5, 17.7.4, 17.8.2

Is CVE-2024-9870 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: last yr. (2025-02-12)

Exploit prediction

0.39% chance of exploitation in the next 30 days, higher than 33% of all scored CVEs (FIRST EPSS, 2026-11-11).

Exploits and checks

hackerone.com https://hackerone.com/reports/2734142 referenced PoC, tagged "exploit" by a source, unverified
gitlab.com https://gitlab.com/gitlab-org/gitlab/-/issues/498911 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
OSV	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
bitnami	gitlab	>=15.11.0, <17.8.2	17.8.2

Affected products

GitLab GitLab

Classification

Weakness

CWE-441 Unintended Proxy or Intermediary
CWE-918 Server-Side Request Forgery

Technology feeds

GitLab rss critical rss

References

hackerone.com /reports/2734142
technical-description, exploit, permissions-required, web
gitlab.com /gitlab-org/gitlab/-/issues/498911
issue-tracking, permissions-required, exploit, evidence
nvd.nist.gov /vuln/detail/CVE-2024-9870
web

Sources

Fencer Intel 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: Added CPE configurations because not yet analyzed by NVD.

json all entries feed