WordPress security changelog
MEDIUM CVE-2024-5223 Deferred

Post Grid Gutenberg Blocks and WordPress Blog Plugin – PostX: Cross-site scripting

Post Grid Gutenberg Blocks and WordPress Blog Plugin – PostX is affected by cross-site scripting. Exploitation requires at least author-level access. Injected script can execute in the affected site's origin when the vulnerable output is viewed.

CVE / CNA score 6.4 CVSS 3.1 · security@wordfence.com
NVD score Pending NVD has not published its own CVSS assessment.
Component
Post Grid Gutenberg Blocks and WordPress Blog Plugin – PostX
Plugin slug
ultimate-post
Affected
See vendor advisory
Safe version
See mitigation notes
Published
May 30, 2024
Weakness
CWE-79 — Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

This CVE was published May 30, 2024 and is one of 16 known issues for this plugin.

What to do

Update, patch or deactivate.

Update Post Grid Gutenberg Blocks and WordPress Blog Plugin – PostX to a release outside the affected range, or disable and remove it until a fixed version is available.

No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical description

The Post Grid Gutenberg Blocks and WordPress Blog Plugin – PostX plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's file uploading feature in all versions up to, and including, 4.1.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

References

Primary and upstream sources