CVE-2020-13277 — An authorization issue in the mirroring logic allowed read access to private rep

An authorization issue in the mirroring logic allowed read access to private repositories in GitLab CE/EE 10.6 and later through 13.0.5

01What is this vulnerability?

An authorization issue in the mirroring logic allowed read access to private repositories in GitLab CE/EE 10.6 and later through 13.0.5

02Affected products

Vendor	Product	Versions
GitLab	GitLab	>=10.6, <12.9.10, >=12.10, <12.10.11, >=13.0, <13.0.6

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2020-06-19T17:20:01.000Z
• Last modified: 2024-08-04T12:11:19.490Z

09References

• gitlab.com — https://gitlab.com/gitlab-org/gitlab/-/issues/220972
• hackerone.com — https://hackerone.com/reports/894569
• gitlab.com — https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-13277.json