Vulnerability · Published Sep 11, 2025 · Assigned by VulDB
CVE-2025-10254Ascensio System SIA OnlyOffice SVG Image Messages.aspx cross site scripting
Low 3.5
In plain English
A low-severity cross-site scripting in OnlyOffice from Ascensio System SIA. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities).
Official description
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."
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Ascensio System SIA | OnlyOffice | 12.012.112.212.312.412.512.612.7.0 |
Weakness: CWE-79, CWE-94 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N/E:P/RL:X/RC:C
References
- VDB-323614 | Ascensio System SIA OnlyOffice SVG Image Messages.aspx cross site scripting vdb-entry
- VDB-323614 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
- Submit #635870 | Ascensio System SIA OnlyOffice Community Server 12.7.0 Cross Site Scripting third-party-advisory
- https://hkohi.ca/vulnerability/20 exploit