Colibri Page Builder <= 1.0.272 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'colibri-gallery-slideshow' Shortcode

Description

The Colibri Page Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'colibri-gallery-slideshow' shortcode in all versions up to, and including, 1.0.272 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.

Scores

EPSS (exploitation in 30 days)

0.45% · top 61% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.4.

Weakness

• CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (opens in a new tab)All about CWE-79 and its CVEs

Affected products

• extendthemes · Colibri Page Builder

  • affected ≤ 1.0.272

References (2)

• https://www.wordfence.com/threat-intel/vulnerabilities/id/f5ba832e-98bc-421d-9b60-e6260c408815?source=cve (opens in a new tab)x_transferred
• https://plugins.trac.wordpress.org/changeset/3074785/colibri-page-builder/trunk/extend-builder/shortcodes/index.php (opens in a new tab)x_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2024-3340](https://trackcve.app/badge/CVE-2024-3340.svg)](https://trackcve.app/cve/CVE-2024-3340)

Record last updated 8 Apr 2026, 17:33 UTC.