What is CVE-2025-5301?

CVE-2025-5301 is a medium-severity vulnerability in Onlyoffice Docs (Documentserver), classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-06-12.

How severe is CVE-2025-5301?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Onlyoffice Docs (Documentserver)

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. Attackers could inject malicious scripts via crafted HTTP POST reques…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.349 (98.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Onlyoffice Docs (Documentserver) — versions <=8.3.1

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

551230f0-3615-47bd-b7cc-93e92e730bbf (third-party-advisory)
551230f0-3615-47bd-b7cc-93e92e730bbf (release-notes)
af854a3a-2127-422b-91ae-364da2661108
134c704f-9b21-4f2e-91b3-4a467353bcc0

Frequently asked questions

What is CVE-2025-5301?: CVE-2025-5301 is a medium-severity vulnerability in Onlyoffice Docs (Documentserver), classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-06-12.
How severe is CVE-2025-5301?: Medium severity. CVSS v3 base score is 6.1 out of 10.