VulnerabilityDeferred

CVE-2025-5301

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.

MEDIUM 6.1EPSS 46.1%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 46.1%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.

Description

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: 6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS: 46.10% probability · 99th percentile
CISA KEV: Not listed
Weakness: CWE-79
Source: 551230f0-3615-47bd-b7cc-93e92e730bbf

References

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

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.