CVE-2025-10254 MEDIUM

CVE-2025-10254: Ascensio System SIA OnlyOffice SVG Image Messages.aspx cross site scripting

Vendor Ascensio System Sia
Product OnlyOffice
Weakness CWE-79 · XSS
Published September 11, 2025
Last update September 11, 2025
View on NVD All CVEs

CVSS base score

5.1/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction —
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P

What the vulnerability does

01Description

A vulnerability was found in Ascensio System SIA OnlyOffice up to 12.7.0. This issue affects some unknown processing of the file /Products/Projects/Messages.aspx of the component SVG Image Handler. Performing manipulation results in cross site scripting. The attack may be initiated remotely. The exploit has been made public and could be used. The vendor was informed early about this issue and replied: "We are already working on this case, and the issues will be resolved in one of the upcoming patches."

Key dates

02Disclosure timeline

September 11, 2025 CVE published
September 11, 2025 Record updated