CVE-2026-25511Public exploitNetwork attack vector

Authenticated SSRF via unvalidated WOPI discovery URL

Published Feb 4, 2026 · Updated Feb 4, 2026

SSRF in Intermesh BV GroupOffice before 6.8.150, 25.0.82, and 26.0.5 allows remote authenticated users to read internal data. The WOPI Service.setUrl method stores an unvalidated URL, and discover appends /hosting/discovery before the HTTP client fetches it and logs the response. System Administrator membership and permission to manage WOPI services are required; fragment URLs bypass the suffix, and file reads depend on cURL allowing file URLs.

CVSS severity8.2
High
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Intermesh BV GroupOffice before 6.8.150, 25.0.82, and 26.0.5 allows remote authenticated users to read internal data. The WOPI Service.setUrl method stores an unvalidated URL, and discover appends /hosting/discovery before the HTTP client fetches it and logs the response. System Administrator membership and permission to manage WOPI services are required; fragment URLs bypass the suffix, and file reads depend on cURL allowing file URLs.

The record

CVE
CVE-2026-25511
Published
Feb 4, 2026
Updated
Feb 4, 2026
Vendor
Intermesh BV
Product
GroupOffice
Classifications
CWE-918
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Feb 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 25.0.82
  2. Affected versionversion=< 26.0.5
  3. Affected versionversion=< 6.8.150

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Intermesh BV · GroupOfficeversion=< 25.0.82; version=< 26.0.5; version=< 6.8.150

Published CVSS scores

8.2GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
4.9NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)

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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