CVE-2025-10255 – Ascensio System SIA OnlyOffice Comment Messages.aspx cross site scripting

CVE ID : CVE-2025-10255

Published : Sept. 11, 2025, 4:15 p.m. | 26 minutes ago

Description : A vulnerability was determined in Ascensio System SIA OnlyOffice up to 12.7.0. Impacted is an unknown function of the file /Products/Projects/Messages.aspx of the component Comment Handler. Executing manipulation can lead to cross site scripting. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized. 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.”

Severity: 5.1 | MEDIUM

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