GitLab EE/CE 11.1 through 12.9 is vulnerable to parameter tampering on an upload feature that allows an unauthorized user to read content a…

published 2020-03-27 6y ago modified 2026-09-08 2mo ago also BIT-gitlab-2020-10955 , EUVD-2020-3359

cvss: 6.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.0%; EPSS 1.0% chance of exploitation in 30 days, percentile 63%
public exploits: 0; none known

GitLab EE/CE 11.1 through 12.9 is vulnerable to parameter tampering on an upload feature that allows an unauthorized user to read content available under specific folders.

Patch / fix

fixed in 2

bitnami gitlab 12.9.1
gitlab gitlab 12.9.1

Is CVE-2020-10955 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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Exploit prediction

1.03% chance of exploitation in the next 30 days, higher than 63% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD	2.0	4.0	AV:N/AC:L/Au:S/C:P/I:N/A:N
OSV	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem	package	affected	fixed in
bitnami	gitlab	>=11.1.0, <12.9.1	12.9.1

Classification

Weakness

CWE-862 Missing Authorization

Technology feeds

GitLab rss critical rss

References

debian.org /security/2020/dsa-4691
vendor-advisory, third-party-advisory, advisory
about.gitlab.com /releases/categories/releases/
release-notes, vendor-advisory, advisory
about.gitlab.com /releases/2020/03/26/security-release-12-dot-9-dot-1-released/
release-notes, vendor-advisory, advisory
nvd.nist.gov /vuln/detail/CVE-2020-10955
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.