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VulnerabilityPublished

CVE-2026-33755: Intermesh groupoffice · SQL Injection

Affects Intermesh groupofficeSource CVE Database V5

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Not known to be exploited · CVSS 8.8 High · fixed in 26.0.17 : patch Intermesh groupoffice soon.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score
8.8High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 33% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 26.0.17, 25.0.92, 6.8.158
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 27 Mar 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade groupoffice and intermesh/groupoffice to 26.0.17, 25.0.92 or 6.8.158.

Affected software

ProductAffectedFixed in
IntermeshgroupofficeAffected
  • <26.0.17
Fixed in
  • 26.0.17
IntermeshgroupofficeAffected
  • <25.0.92
Fixed in
  • 25.0.92
IntermeshgroupofficeAffected
  • <6.8.158
Fixed in
  • 6.8.158
GitHubintermesh/groupofficepkg:github/intermesh/groupofficeOther threatsAffected
  • <6.8.158
  • <25.0.92
  • <26.0.17
Fixed in
  • 6.8.158
  • 25.0.92
  • 26.0.17

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

To mitigate CVE-2026-33755, organizations should immediately upgrade Group-Office to versions 6.8.158, 25.0.92, or 26.0.17 or later, where the vulnerability is patched. Until upgrades can be applied, restrict access to the JMAP Contact/query endpoint by limiting authenticated user permissions and network access to trusted users only. Implement strict monitoring and logging of database queries and user activities to detect anomalous behavior indicative of SQL injection attempts or session token misuse. Employ web application firewalls (WAFs) with custom rules to detect and block SQL injection payloads targeting the vulnerable endpoint. Conduct regular security assessments and penetration testing focused on authentication and injection vulnerabilities. Additionally, enforce strong authentication mechanisms and session management policies to reduce the risk of session token theft and reuse. Educate users about the importance of safeguarding credentials and promptly reporting suspicious activity.

Description

Group-Office is an enterprise customer relationship management and groupware tool. Prior to versions 6.8.158, 25.0.92, and 26.0.17, an authenticated SQL Injection vulnerability in the JMAP `Contact/query` endpoint allows any authenticated user with basic addressbook access to extract arbitrary data from the database — including active session tokens of other users. This enables full account takeover of any user, including the System Administrator, without knowing their password. Versions 6.8.158, 25.0.92, and 26.0.17 fix the issue.

References

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