PT-2026-33013 · WordPress · Include Post By

Nail Majdeddine · Published 2026-04-15 · Updated 2026-04-24 · CVE-2026-5717

Positive Technologies (AI Summary)

CVSS v3.1

6.4

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions VI: Include Post By versions prior to 0.4.200706

Description Stored Cross-Site Scripting occurs due to insufficient input sanitization and output escaping on user supplied attributes. Authenticated attackers with contributor-level access and above can inject arbitrary web scripts via the class container attribute of the 'include-post-by-cat' shortcode. These scripts execute whenever a user accesses an affected page.

Recommendations Update to a version later than 0.4.200706.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-5717

Affected Products

Include Post By

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2026-5717 · Security Note
• https://reddit.com/r/StopBadBots/comments/1su8tkw/unpatched_threat_why_you_must_remove_these_29 · Reddit Post
• https://twitter.com/CVEnew/status/2044338838882132246 · Twitter Post
• https://wordfence.com/threat-intel/vulnerabilities/id/b3e95dc2-0f50-4009-9cc0-a02f9977ce58?source=cve · Note
• https://plugins.trac.wordpress.org/browser/vi-include-post-by/tags/0.4.200706/vi_include_post_by.php#L809 · Note
• https://plugins.trac.wordpress.org/browser/vi-include-post-by/trunk/vi_include_post_by.php#L809 · Note
• https://twitter.com/VulmonFeeds/status/2044530922536456297 · Twitter Post