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Fencer Intel
high 8.3

CVE-2020-13321 json

A vulnerability was discovered in GitLab versions prior to 13.1.

published 6y ago modified 2mo ago also BIT-gitlab-2020-13321 , EUVD-2020-5581

cvss
8.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.4%
EPSS 1.4% chance of exploitation in 30 days, percentile 72%
public exploits
0
none known

Summary

A vulnerability was discovered in GitLab versions prior to 13.1. Username format restrictions could be bypassed allowing for html tags to be added.

Patch / fix

  • bitnami gitlab 12.10.13, 13.0.8, 13.1.2
  • gitlab gitlab 12.10.13, 13.0.8, 13.1.2
  • gitlab gitlab_enterprise 12.10.13, 13.0.8, 13.1.2

Is CVE-2020-13321 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

1.42% chance of exploitation in the next 30 days, higher than 72% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • gitlab.com https://gitlab.com/gitlab-org/gitlab/-/issues/25751 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 8.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
NVD 3.1 8.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
NVD 2.0 6.5 AV:N/AC:L/Au:S/C:P/I:P/A:P
OSV 3.1 8.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

Affected packages

ecosystem package affected fixed in
bitnami gitlab
<12.10.13
>=13.0.0, <13.0.8
>=13.1.0, <13.1.2
12.10.13
13.0.8
13.1.2

Affected products

  • GitLab GitLab

Classification

Technology feeds

References

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: Enhance with deb and rpm package type records.