CVE-2026-107323: CWE-79 Cross-Site Scripting (XSS) in Gallery PhotoBlocks
Description
The Gallery PhotoBlocks WordPress plugin before 1.3.6 does not sanitize and escape one of its gallery settings before outputting it into an HTML attribute, allowing users with Contributor-level access and above to store JavaScript that executes in the browser of anyone who views a page containing the gallery, including administrators.
CVSS v3.1
Score 6.8medium
Affected software
Gallery PhotoBlocks
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Gallery PhotoBlocks WordPress plugin before version 1.3.6 contains a stored Cross-Site Scripting (CWE-79) vulnerability. Specifically, one of its gallery settings is not sanitized or escaped before being output into an HTML attribute. This flaw permits users with Contributor-level permissions or higher to inject malicious JavaScript code that executes in the context of any user viewing the gallery page, potentially leading to session hijacking or other browser-based attacks.
Potential Impact
Users with Contributor-level access and above can inject persistent JavaScript code into gallery settings. This code executes in the browsers of all users who view the affected gallery, including administrators, potentially allowing attackers to perform actions such as session hijacking or privilege escalation within the WordPress environment.
Mitigation Recommendations
Upgrade the Gallery PhotoBlocks plugin to version 1.3.6 or later, where this vulnerability is fixed. Since the affected versions are explicitly identified as >=1.3.5 and <1.3.6, applying the official update eliminates the risk. No other mitigation is indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-10-07T17:37:38.719Z
- State
- PUBLISHED
Threat ID: 6ac9d55a2cdf04f6560b02b3
Added to database: 10/10/2026, 06:04:10 UTC
Last enriched: 10/10/2026, 06:18:50 UTC
Last updated: 10/10/2026, 21:26:29 UTC
Views: 15
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