What’s Vulnerable › Vulnerabilities

CVE-2024-4546: Custom Post Type Attachment <= 3.4.5 - Authenticated (Contributor+) Stored Cross-Site Scripting via pdf_attachment Shortcode

• Severity: medium (CVSS 6.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-05-16 · updated 2026-06-17
• Weakness: CWE-79

Description

The Custom Post Type Attachment plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'pdf_attachment' shortcode in all versions up to, and including, 3.4.5 due to insufficient input sanitization and output escaping on user supplied attributes. 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.

Affected products

• avimegladon Custom Post Type Attachment: through 3.4.5

References

• https://plugins.trac.wordpress.org/changeset/3087121/
• https://www.wordfence.com/threat-intel/vulnerabilities/id/f6ba2907-36f4-4c4d-9e25-d13d32e28690?source=cve
• https://plugins.trac.wordpress.org/changeset/3087121/
• https://www.wordfence.com/threat-intel/vulnerabilities/id/f6ba2907-36f4-4c4d-9e25-d13d32e28690?source=cve

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