Cross-site scripting in gogs - CVE-2025-47943
Published: April 27, 2026
Vulnerability identifier: #VU128079
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-47943
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: gogs.io
Affected software:
gogs
gogs
Detailed vulnerability description
The vulnerability allows a remote user to execute arbitrary javascript code in the victim's browser.
The vulnerability exists due to cross-site scripting in the PDF renderer using pdfjs-1.4.20 when previewing an uploaded PDF file. A remote user can upload a specially crafted PDF file to execute arbitrary javascript code in the victim's browser.
User interaction is required to click on the uploaded file for preview.
How to mitigate CVE-2025-47943
Install security update from vendor's website.