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GHSA-vgvf-m4fw-938j
No affected components available
Summary
Stored XSS is still possible through unsafe template rendering that mixes user input with safe() plus permissive sanitizer handling of data URLs.
Details
safe() still turns off escaping:
- internal/template/template.go
func safe(raw string) template.HTML { return template.HTML(raw) }
Branch pages still render committer names using safe():
- templates/repo/branches/overview.tmpl
- templates/repo/branches/all.tmpl
- templates/repo/wiki/view.tmpl
The locale still injects a raw second argument: conf/locale/locale_en-US.ini (branches.updated_by = updated %[1]s by %[2]s)
Impact
An attacker who can inject commit metadata such as author/committer name can trigger script execution on affected pages, leading to session abuse, CSRF token theft, or unauthorized actions.
Recommended Fix
- Untrusted arguments should be escaped before being used in translations.
- Data URLs should be limited or blocked in the sanitizer.
Remediation
A fix is available at https://github.com/gogs/gogs/releases/tag/v0.14.2.
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability.
Limited exploitation activity has been observed. Close monitoring and planned remediation are recommended.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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