CVE-2025-10255Public exploitNetwork attack vector

Authenticated script injection via iframe-enabled project comments

Published Sep 11, 2025 · Updated Sep 11, 2025

Stored cross-site scripting in OnlyOffice Community Server 12.7.0 allows remote authenticated users to inject iframe content into project comments. The comment editor accepts and stores iframe HTML that loads attacker-controlled content when /Products/Projects/Messages.aspx renders the comment. An authenticated user must create or edit a project comment, and another user must view it before the embedded content loads.

CVSS severity3.5
Low
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in OnlyOffice Community Server 12.7.0 allows remote authenticated users to inject iframe content into project comments. The comment editor accepts and stores iframe HTML that loads attacker-controlled content when /Products/Projects/Messages.aspx renders the comment. An authenticated user must create or edit a project comment, and another user must view it before the embedded content loads.

The record

CVE
CVE-2025-10255
Published
Sep 11, 2025
Updated
Sep 11, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-94, CWE-79
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 11, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

3.5VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
4.0VulDBAV:N/AC:L/Au:S/C:N/I:P/A:N
2.0VulDBCVSS: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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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