WordPress Post Grid Master plugin <= 3.4.8 - Auth. Cross Site Scripting (XSS) vulnerability

published 2024-05-06 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-34762

cvss: 6.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 26%
public exploits: 0; none known

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in AddonMaster Post Grid Master allows Stored XSS.This issue affects Post Grid Master: from n/a through 3.4.8.

Patch / fix

fixed in 1

addonmaster post_grid_master 3.4.12

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-06-12)

Exploit prediction

0.33% chance of exploitation in the next 30 days, higher than 26% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L

Affected products

AddonMaster Post Grid Master

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

Technology feeds

WordPress rss critical rss

References

patchstack.com /database/vulnerability/ajax-filter-posts/wordpress-post-grid-master-plugin-3-4-8-auth-cross-site-scripting-xs
vdb-entry, third-party-advisory

Sources

CVE List CVE-2024-34390
NVD CVE-2024-34390

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary