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FastX WordPress Theme CVE-2026-2518

| EUVD-2026-31412 MEDIUM
Missing Authorization (CWE-862)
2026-05-22 Wordfence GHSA-jjqp-72fq-xmqp
4.3
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

Lifecycle Timeline

1
Analysis Generated
May 22, 2026 - 05:15 vuln.today

DescriptionNVD

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.

AnalysisAI

Missing authorization controls in the FastX WordPress theme allow authenticated Subscriber-level users to install and activate the PostX plugin without administrative approval. The vulnerability exists in two AJAX callback functions - 'ultp_install_callback' and 'ultp_activate_callback' - which fail to verify whether the requesting user holds sufficient capabilities before executing privileged plugin management operations. …

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CVE-2026-2518 vulnerability details – vuln.today

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