CVE-2026-40896

HIGH EPSS 7.1%
Published Apr 20, 20262mo ago · Modified Jun 17, 20262w ago
7.1 CVSS 3.1
High
Find Similar
Published Apr 20, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

Description

OpenProject is open-source, web-based project management software. Prior to version 17.3.0, a user with `manage_agendas` permission in any project can inject agenda items into meetings belonging to any other project on the instance — even projects they have no access to. No knowledge of the target project, meeting, or victim is required; the attacker can blindly spray items into every meeting on the instance by iterating sequential section IDs. Version 17.3.0 patches the issue.

CVSS Details

Base Score
7.1
Exploitability
2.8
Impact
4.2
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity High
Availability None

Threat Intelligence

EPSS Exploit Probability
7.1% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 2

CWE-367
CWE-639

Affected Products 1

VendorProductVersionRange
openprojectopenproject* <17.3.0

References 2

  • github.com https://github.com/opf/openproject/commit/8f693a1f35d0a84bb69af78fb6925f74329ae4fe
    Patch
  • github.com https://github.com/opf/openproject/security/advisories/GHSA-hh5p-gwf8-h245
    ExploitMitigationVendor Advisory

Remediation

  • github.com https://github.com/opf/openproject/commit/8f693a1f35d0a84bb69af78fb6925f74329ae4fe
    Patch