CVE-2021-28378 Cross-site Scripting in Gitea

What is CVE-2021-28378?

CVE-2021-28378 is a low-severity cross-site scripting vulnerability in Gitea Gitea, published on 15 Mar 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

Gitea 1.12.x and 1.13.x before 1.13.4 allows XSS via certain issue data in some situations.

Weakness: CWE-79

Which versions are affected by CVE-2021-28378?

4 open source packages ship an affected version, including code.gitea.io/gitea and gitea. It affects 1 product.

Products include Gitea Gitea.

How do I fix CVE-2021-28378?

Upgrade code.gitea.io/gitea to 1.13.4 or later.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2021-28378 being exploited?

There is no known exploitation of CVE-2021-28378 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

Other vulnerabilities in Gitea Gitea

• CVE-2026-60004 Gitea Code Injection Exploited Critical 9.8
• CVE-2026-73278 Gitea WebAuthn bypass during OAuth and OIDC sign-in Critical 9.8
• CVE-2026-94205 Gitea fork workflow approval bypass through maintainer-triggered events Critical 9.8
• CVE-2022-42968 Gitea vulnerable to Argument Injection Critical 9.8
• CVE-2021-45330 Improper Privilege Management in Gitea Critical 9.8

All Gitea Gitea vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-gitea-2021-28378, CLEANSTART-2025-BP00020, GHSA-g95p-88p4-76cm, GO-2022-0832.