What is CVE-2020-28991?

CVE-2020-28991 is a critical-severity vulnerability in Gitea. CVSS score: 9.8/10. Published 2020-11-24.

How severe is CVE-2020-28991?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Gitea

CVE-2020-28991

Gitea 0.9.99 through 1.12.x before 1.12.6 does not prevent a git protocol path that specifies a TCP port number and also contains newlines (with URL encoding) in ParseRemoteAddr in modules/auth/repo_form.go.

Published 2020-11-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.017 (76.8th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 76.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000

Affected products

Gitea

References

github.com/go-gitea/gitea/pull/13525 (Patch, Third Party Advisory)
github.com/go-gitea/gitea/releases/tag/v1.12.6 (Third Party Advisory, Release Notes)

Frequently asked questions

What is CVE-2020-28991?: CVE-2020-28991 is a critical-severity vulnerability in Gitea. CVSS score: 9.8/10. Published 2020-11-24.
How severe is CVE-2020-28991?: Critical severity. CVSS v3 base score is 9.8 out of 10.