CVE-2026-25564
Published: 07 February 2026
Summary
CVE-2026-25564 is a high-severity Authorization Bypass Through User-Controlled Key (CWE-639) vulnerability in Wekan Project Wekan. Its CVSS base score is 7.1 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 2.8th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 AC-3 (Access Enforcement) and AC-4 (Information Flow Enforcement).
Deeper analysis
CVE-2026-25564 is an insecure direct object reference (IDOR) vulnerability, classified under CWE-639, affecting WeKan versions prior to 8.19. The flaw exists in checklist creation and related checklist routes, where the implementation fails to verify that the supplied cardId belongs to the supplied boardId. This allows attackers to manipulate identifiers for cross-board tampering. The vulnerability received a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N) and was published on 2026-02-07.
Unauthenticated attackers (PR:N) can exploit this over the network (AV:N) with low complexity (AC:L) and no user interaction (UI:N). By supplying a cardId from a different boardId, they can perform unauthorized actions such as checklist creation or deletion on cards outside their authorized scope, leading to high integrity impact (I:H) without affecting confidentiality or availability.
Mitigation involves updating to WeKan version 8.19 or later, as detailed in the fixing commit at https://github.com/wekan/wekan/commit/08a6f084eba09487743a7c807fb4a9000fcfa9ac, which adds the necessary relationship validation. Additional details are available in the VulnCheck advisory at https://www.vulncheck.com/advisories/wekan-checklist-deletion-idor-via-missing-relationship-validation and on the WeKan site at https://wekan.fi/.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-5708
Vulnerability details
WeKan versions prior to 8.19 contain an insecure direct object reference (IDOR) in checklist creation and related checklist routes. The implementation does not verify that the supplied cardId belongs to the supplied boardId, allowing cross-board ID tampering by manipulating identifiers.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
IDOR in public-facing WeKan web app enables unauthenticated network exploitation (T1190) and direct unauthorized stored data tampering via checklist create/delete (T1565.001).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly enforces authorization checks on supplied cardId and boardId so that checklist operations cannot be performed on objects outside the caller's authorized scope.
Enforces information-flow rules between boards and cards, blocking the cross-board identifier tampering that the missing relationship validation permits.
Requires validation of input parameters (cardId vs. boardId) to reject inconsistent or unauthorized object references before any checklist action is executed.