CVE-2026-16603: CWE-200 Information Exposure in Passster
Passster WordPress plugin versions before 4.3.6 have a vulnerability that allows unauthenticated users to bypass category-based content protection on the WordPress REST API. This flaw exposes the full content, title, and excerpt of posts locked by category through the core REST API without authentication.
AI Analysis
Technical Summary
CVE-2026-16603 is an information exposure vulnerability (CWE-200) in the Passster WordPress plugin. Versions prior to 4.3.6 do not enforce category-based content restrictions on the WordPress REST API endpoints, enabling unauthenticated attackers to retrieve protected post content, including full content, titles, and excerpts, via the core REST API. This bypass compromises the confidentiality of category-locked posts.
Potential Impact
The vulnerability allows any unauthenticated user to access sensitive content that should be restricted by category-based protection. This results in a confidentiality breach, exposing potentially sensitive or private information without requiring authentication or privileges. There is no impact on integrity or availability reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. The description references versions before 4.3.6 as vulnerable, implying that 4.3.6 or later may contain a fix. Until official confirmation, users should upgrade to version 4.3.6 or later once available. No temporary or alternative mitigations are specified.
CVE-2026-16603: CWE-200 Information Exposure in Passster
Description
Passster WordPress plugin versions before 4.3.6 have a vulnerability that allows unauthenticated users to bypass category-based content protection on the WordPress REST API. This flaw exposes the full content, title, and excerpt of posts locked by category through the core REST API without authentication.
CVSS v3.1
Score 7.5high
Affected software
Passster
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-16603 is an information exposure vulnerability (CWE-200) in the Passster WordPress plugin. Versions prior to 4.3.6 do not enforce category-based content restrictions on the WordPress REST API endpoints, enabling unauthenticated attackers to retrieve protected post content, including full content, titles, and excerpts, via the core REST API. This bypass compromises the confidentiality of category-locked posts.
Potential Impact
The vulnerability allows any unauthenticated user to access sensitive content that should be restricted by category-based protection. This results in a confidentiality breach, exposing potentially sensitive or private information without requiring authentication or privileges. There is no impact on integrity or availability reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. The description references versions before 4.3.6 as vulnerable, implying that 4.3.6 or later may contain a fix. Until official confirmation, users should upgrade to version 4.3.6 or later once available. No temporary or alternative mitigations are specified.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-07-22T14:20:50.104Z
- State
- PUBLISHED
Threat ID: 6a72d7aebf8831d5395e82b3
Added to database: 08/05/2026, 06:26:54 UTC
Last enriched: 08/12/2026, 15:33:14 UTC
Last updated: 09/17/2026, 22:01:33 UTC
Views: 28
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