How to Fix CVE-2024-6886: Cross-Site Scripting in Gitea Open Source Git Server

What is CVE-2024-6886?

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea Gitea Open Source Git Server allows Stored XSS.This issue affects Gitea Open Source Git Server: 1.22.0.

In modern deployments, an XSS in a privileged context (admin panel, support portal) routinely escalates to full session takeover and admin actions performed in the victim's browser. The fact that XSS is 'just JavaScript' is not a defense.

Am I affected?

You are affected if you run Gitea Open Source Git Server 1.22.0.

Run gitea --version against the Gitea binary, or check the running build in the web UI footer. Compare to the patched build in the Gitea release notes linked under References.

If the build is older than the patched release listed under Fixed in, this CVE applies and you should follow the remediation steps below.

How to fix CVE-2024-6886

The vendor fix is to upgrade to a patched build. The verified patched version per the official advisory is See the vendor advisory linked in References for the exact patched version.

1. Read the official advisory for the exact patched build that applies to your deployment model (see https://github.com/go-gitea/gitea/pull/31200).

1. Plan the upgrade window. Gitea Open Source Git Server updates are not always hot-pluggable; check the vendor's release notes for required restarts, database migrations, or licensing steps before scheduling production downtime.

1. Take a verified backup of configuration and data before upgrading. Roll-back is faster than rebuilding.

1. Apply the patch or upgrade using your normal package or vendor installer flow. Use the vendor's documented procedure, not a third-party guide.

1. Restart services as the advisory directs. Some fixes only become active after a service restart, others after a full reboot.

Patch via your OS package manager

# The exact package name and patched version are listed in the vendor advisory:
# https://github.com/go-gitea/gitea/pull/31200
# Debian / Ubuntu
sudo apt update
sudo apt install --only-upgrade git

# RHEL / Rocky / AlmaLinux / Fedora
sudo dnf upgrade git

# openSUSE
sudo zypper update git

# Verify the running version matches the fixed version
dpkg -s git 2>/dev/null | grep -i version || rpm -q git 2>/dev/null

# Windows: pull the cumulative update that ships this fix.
Install-Module PSWindowsUpdate -Force -SkipPublisherCheck
Get-WindowsUpdate -AcceptAll -Install -AutoReboot

Verify the fix landed

# 1. Confirm the running version matches the fixed-in version from the advisory:
#    https://github.com/go-gitea/gitea/pull/31200
#    Use the platform-specific version probe above.

# 2. Re-scan with your vulnerability scanner (Nessus, Qualys, Tenable, OpenVAS).
#    The scanner should no longer flag CVE-2024-6886 on the patched target.

# 3. Inspect recent service / kernel logs for crash loops or rollback events.
journalctl -u <service> --since "10 minutes ago"
dmesg --since "10 minutes ago"

If you can't patch immediately

Apply only mitigations documented by the vendor. If no official workaround is published, the patched build is the only supported remediation. While you plan the upgrade window:

• Restrict network reach. Put Gitea Open Source Git Server behind a VPN, an allow-listed reverse proxy, or a firewall rule limiting source IPs to the addresses that legitimately need access. This shrinks the attack surface without changing the application.
• Block known-malicious payloads at the WAF. Generic XSS rules will not stop targeted attacks but they raise the cost noticeably. Treat WAF rules as defense-in-depth, never as the primary fix.
• Increase logging and alerting on the affected service. Even if the workaround does not block the exploit, fast detection of an attempt is a meaningful control.

How to verify the fix worked

1. Confirm the running version of Gitea Open Source Git Server matches or exceeds the patched build the vendor specifies. The CVE record under References lists the fixed version explicitly.

1. Check service logs for restart messages and verify the service came up clean after the upgrade. A failed restart that silently rolls back to the unpatched binary is a common operational mistake.

1. Review the audit log for any suspicious access during the period the system was unpatched. Pre-patch exploitation leaves traces; failed login bursts, unexpected file uploads, and new admin accounts are common indicators. If the host was reachable from the internet during the exposure window, assume the IoC hunt is mandatory rather than optional.

1. Re-run a vulnerability scanner (Nessus, Qualys, Tenable, OpenVAS) against the host after patching. The scanner should no longer flag this CVE on the same target. If it still does, double-check that you upgraded the right component, since many products bundle several services and only one of them may carry the fix.

Frequently asked questions

Related fixes

Other vulnerabilities in the same area that are worth patching alongside this one:

• How to Fix CVE-2024-42448: Remote Code Execution in Service Provider Console — Remote Code Execution in Service Provider Console
• How to Fix CVE-2024-40711: Veeam Backup & Replication Deserialization RCE — Veeam Backup & Replication Deserialization RCE
• How to Fix CVE-2024-8957: OS Command Injection in Ptzoptics PT30X-NDI , OS Command Injection in Ptzoptics PT30X-NDI
• How to Fix CVE-2024-7399: Path Traversal in MagicINFO 9 Server , Path Traversal in MagicINFO 9 Server
• How to Fix CVE-2024-3272: Hard-coded Credentials in DNS-320L , Hard-coded Credentials in DNS-320L

Is CVE-2024-6886 being exploited in the wild?

There are no public reports of in-the-wild exploitation at the time of this writing, and it is not currently listed in CISA KEV. That does not mean exploitation will not happen. Patch on the vendor timeline regardless.

Does the patch require a reboot?

It depends on the deployment. Gitea Open Source Git Server updates that replace running services usually need at minimum a service restart; some require a host reboot. Check the vendor release notes linked under References for the exact post-upgrade steps.

What if my version of Gitea Open Source Git Server is end-of-life?

End-of-life builds will not receive the fix. The vendor's published guidance in cases like this is to upgrade to a supported branch first, then apply the patched build. Running an EOL release on an internet-reachable interface is the higher risk.

References

• Official vendor advisory: https://github.com/go-gitea/gitea/pull/31200
• Additional: https://blog.gitea.com/release-of-1.22.1/
• NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-6886
• CISA KEV catalog entry: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

*This guide was assembled from the official vendor advisory, the NVD record, and the CISA KEV listing on 2026-05-25. Always confirm against the vendor's advisory before applying changes in production. Byline: Sai Kiran Pandrala.*