What’s Vulnerable › Vulnerabilities

CVE-2026-2518: FastX <= 1.0.2 - Missing Authorization to Authenticated (Subscriber+) Limited Plugin Installation and Activation

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-22 · updated 2026-07-23
• Weakness: CWE-862

Description

The FastX theme for WordPress is vulnerable to unauthorized limited plugin installation and activation due to missing capability checks on the 'ultp_install_callback' and 'ultp_activate_callback' functions in all versions up to, and including, 1.0.2. This makes it possible for authenticated attackers, with Subscriber-level access and above, to install and activate the PostX plugin.

Affected products

• wpxpo FastX: through 1.0.2

References

• https://themes.trac.wordpress.org/browser/fastx/1.0.2/classes/Initialization.php#L249
• https://themes.trac.wordpress.org/browser/fastx/1.0.2/classes/Initialization.php#L264
• https://www.wordfence.com/threat-intel/vulnerabilities/id/6f5c4194-4f97-4f85-af90-e983ba9ce3a6?source=cve

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