CVE-2026-2141
Published: 08 February 2026
Summary
CVE-2026-2141 is a medium-severity Incorrect Privilege Assignment (CWE-266) vulnerability in 5Kcrm Wukongcrm. Its CVSS base score is 5.3 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 28.0th 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-2026-2141 is an improper authorization vulnerability affecting WuKongOpenSource WukongCRM versions up to 11.3.3. The flaw resides in an unknown function within the file gateway/src/main/java/com/kakarote/gateway/service/impl/PermissionServiceImpl.java, part of the URL Handler component. It stems from issues mapped to CWE-266 (Incorrect Privilege Assignment), CWE-285 (Improper Authorization), and CWE-863 (Incorrect Authorization), with a CVSS v3.1 base score of 6.3 (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L).
The vulnerability enables remote exploitation by attackers who possess low privileges, such as authenticated users with basic access. Exploitation involves manipulating requests to the affected URL Handler, bypassing authorization checks and potentially leading to limited impacts: low-level disclosure of confidential information, modification of data, or denial of service affecting availability.
Advisories from VulDB and a related GitHub issue in SourByte-Lab detail the vulnerability, confirm remote exploitability, and note that a public exploit has been released. The vendor was notified early but provided no response, and no patches or mitigations are mentioned in the available references.
In notable context, the public availability of the exploit increases the risk of active attacks against unpatched WukongCRM instances.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-5807
Vulnerability details
A security flaw has been discovered in WuKongOpenSource WukongCRM up to 11.3.3. This affects an unknown part of the file gateway/src/main/java/com/kakarote/gateway/service/impl/PermissionServiceImpl.java of the component URL Handler. Performing a manipulation results in improper authorization. Remote exploitation of the attack is possible.…
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The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Authorization bypass in web-facing CRM URL handler directly enables remote exploitation for privilege escalation (T1068) and public app exploitation (T1190).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly enforces approved authorizations on the URL Handler, preventing the improper authorization bypass in PermissionServiceImpl.java.
Limits the scope of actions available to low-privilege accounts, reducing impact even if the authorization check is bypassed.
Enforces information flow rules between subjects and objects, blocking unauthorized data access or modification via manipulated requests.