CVE-2026-15939: CWE-863 Incorrect Authorization in Simple Restrict
The Simple Restrict WordPress plugin before 1.2.9 does not enforce its content-restriction permission check on the REST API the way it does on the front end, relying there on a generic capability check instead of the Simple Restrict WordPress plugin before 1.2.9's own permission system, allowing users with contributor-level access or above to read the content of restricted posts and pages they were never granted access to.
AI Analysis
Technical Summary
CVE-2026-15939 describes an incorrect authorization vulnerability (CWE-863) in the Simple Restrict WordPress plugin prior to version 1.2.9. The plugin fails to enforce its content-restriction permission checks consistently on the REST API, using a generic capability check instead of its own permission system. This discrepancy permits users with contributor-level privileges or above to access restricted content via the REST API that they cannot access through the front end. The CVSS v3.1 base score is 2.7 (low severity), reflecting limited confidentiality impact and requiring high privileges.
Potential Impact
Users with contributor-level or higher privileges can read restricted posts and pages through the REST API, bypassing intended content restrictions. There is no impact on integrity or availability. The confidentiality impact is limited to unauthorized reading of restricted content. No known exploits are reported.
Mitigation Recommendations
No official patch or remediation level is currently documented. Users should upgrade to Simple Restrict version 1.2.9 or later once available, as the issue affects all versions prior to 1.2.9. Until a fix is released, consider restricting REST API access to trusted users only or disabling the REST API if feasible.
CVE-2026-15939: CWE-863 Incorrect Authorization in Simple Restrict
Description
The Simple Restrict WordPress plugin before 1.2.9 does not enforce its content-restriction permission check on the REST API the way it does on the front end, relying there on a generic capability check instead of the Simple Restrict WordPress plugin before 1.2.9's own permission system, allowing users with contributor-level access or above to read the content of restricted posts and pages they were never granted access to.
CVSS v3.1
Score 2.7low
Affected software
Simple Restrict
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-15939 describes an incorrect authorization vulnerability (CWE-863) in the Simple Restrict WordPress plugin prior to version 1.2.9. The plugin fails to enforce its content-restriction permission checks consistently on the REST API, using a generic capability check instead of its own permission system. This discrepancy permits users with contributor-level privileges or above to access restricted content via the REST API that they cannot access through the front end. The CVSS v3.1 base score is 2.7 (low severity), reflecting limited confidentiality impact and requiring high privileges.
Potential Impact
Users with contributor-level or higher privileges can read restricted posts and pages through the REST API, bypassing intended content restrictions. There is no impact on integrity or availability. The confidentiality impact is limited to unauthorized reading of restricted content. No known exploits are reported.
Mitigation Recommendations
No official patch or remediation level is currently documented. Users should upgrade to Simple Restrict version 1.2.9 or later once available, as the issue affects all versions prior to 1.2.9. Until a fix is released, consider restricting REST API access to trusted users only or disabling the REST API if feasible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-07-16T08:48:43.957Z
- State
- PUBLISHED
Threat ID: 6a6f99c9bf32cb7a344bda1a
Added to database: 08/02/2026, 19:26:01 UTC
Last enriched: 08/10/2026, 14:26:18 UTC
Last updated: 09/16/2026, 22:01:32 UTC
Views: 39
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