TI-2024-03037 Aliases CVE-2024-3239 GHSA-928w-mwq7-xvqr

PostX < 4.0.2 - Contributor+ Stored XSS

LOW 25CWE-79Published 2024-05-13 · Updated 2024-11-01

Key facts

Attack vector: Network
Privileges required: Low
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-79.

Summary

The Post Grid Gutenberg Blocks and WordPress Blog Plugin WordPress plugin before 4.0.2 does not validate and escape some of its block options before outputting them back in a page/post where the block is embed, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00416 36th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA and NVD

Fix Fixed Post Grid Gutenberg Blocks and WordPress Blog Plugin (Unknown): 4.0.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Unknown	Post Grid Gutenberg Blocks and WordPress Blog Plugin	before 4.0.2	4.0.2	Patch available	CNA

Post Grid Gutenberg Blocks and WordPress Blog Plugin VendorUnknown Affected before 4.0.2 Fixed in 4.0.2 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:wpxpo:postx::::::wordpress::*	before 4.0.2	Vulnerable	wpxpo

cpe:2.3:a:wpxpo:postx:*:*:*:*:*:wordpress:*:* Versions before 4.0.2 Vulnerable ·wpxpo

Remediation

Fix · CNA Post Grid Gutenberg Blocks and WordPress Blog Plugin (Unknown) Fixed in 4.0.2

Timeline

2026-10-02 Threatist record created from CVE-2024-3239
2026-10-03 Alias added: GHSA-928w-mwq7-xvqr

References

Exploit 1

https://wpscan.com/vulnerability/dfa1421b-41b0-4b25-95ef-0843103e1f5e/

TI-2024-09942 PostX <= 4.1.16 - Missing Authorization to Arbitrary Plugin Installation/Activation CVSS 3.1HIGH 8.8
TI-2024-04008 PostX < 4.1.0 - Contributor+ Stored XSS CVSS 3.1MEDIUM 6.8
TI-2023-03707 PostX - Gutenberg Post Grid Blocks < 3.0.6 - Reflected Cross-Site Scripting CVSS 3.1MEDIUM 6.1
TI-2024-20622 WordPress PostX plugin <= 3.2.3 - Author+ Post/Page Duplication vulnerability CVSS 3.1HIGH 8.8
TI-2023-18248 WordPress PostX – Gutenberg Blocks for Post Grid Plugin <= 2.9.9 is vulnerable to Cross Site Scripting (XSS) CVSS 3.1HIGH 7.1
TI-2024-33876 WordPress PostX plugin <= 4.1.12 - Cross Site Scripting (XSS) vulnerability CVSS 3.1MEDIUM 6.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences