CVE-2026-1902
MEDIUMCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Lifecycle Timeline
2Description
The Hammas Calendar plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'apix' parameter in the 'hp-calendar-manage-redirect' shortcode in all versions up to, and including, 1.5.11 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Analysis
Stored XSS in the Hammas Calendar WordPress plugin through version 1.5.11 allows authenticated contributors and above to inject malicious scripts via the 'apix' parameter in the 'hp-calendar-manage-redirect' shortcode due to inadequate input sanitization. When users access pages containing the injected payload, the scripts execute in their browsers, potentially leading to session hijacking, credential theft, or malware distribution. …
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Remediation
Within 30 days: Identify affected systems running all and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.
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External POC / Exploit Code
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