CVE-2025-5301mediumCWE-79

Reflected Cross-Site Scripting in ONLYOFFICE Docs (DocumentServer)

40Vexday Risk Score

Patch soon. It has a working public exploit.

ssvc Attendcvss 6.1epss 62%

exploitation probability

62%top 1% of all CVEs

observed exploitation

nono source reports it

ONLYOFFICE Docs (DocumentServer) in versions equal and below 8.3.1 are affected by a reflected cross-site scripting (XSS) issue when opening files via the WOPI protocol. Attackers could inject malicious scripts via crafted HTTP POST requests, which are then reflected in the server's HTML response.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

OnlyOffice · Docs (DocumentServer)

References

http://seclists.org/fulldisclosure/2025/Jun/18 https://github.com/ONLYOFFICE/DocumentServer/blob/master/CHANGELOG.md#832 https://r.sec-consult.com/onlyoffice https://sec-consult.com/vulnerability-lab/advisory/reflected-cross-site-scripting-in-onlyoffice-docs-documentserver/