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Fencer Vulns
medium 5.3

CVE-2020-12277 json

GitLab 10.8 through 12.9 has a vulnerability that allows someone to mirror a repository even if the feature is not activated.

published 2020-04-29 6 y ago modified 2026-09-08 2 mo ago also BIT-gitlab-2020-12277 , EUVD-2020-4590

cvss
5.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 55%
public exploits
0
none known

Summary

GitLab 10.8 through 12.9 has a vulnerability that allows someone to mirror a repository even if the feature is not activated.

Patch / fix

  • bitnami gitlab 12.7.8, 12.8.8, 12.9.1
  • gitlab gitlab 12.7.8, 12.8.8, 12.9.1

Exploit prediction

0.77% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N
OSV 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected packages

ecosystem package affected fixed in
bitnami gitlab
>=10.8.0, <12.7.8
>=12.8.0, <12.8.8
>=12.9.0, <12.9.1
12.7.8
12.8.8
12.9.1

Classification

Weakness
  • CWE-276 Incorrect Default Permissions
Technology feeds

References

Sources

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.