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Fencer Vulns
medium 6.8

CVE-2024-4305 json

PostX < 4.1.0 - Contributor+ Stored XSS

published 2024-06-17 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-43950

cvss
6.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 37%
public exploits
0
none known

Summary

The Post Grid Gutenberg Blocks and WordPress Blog Plugin WordPress plugin before 4.1.0 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

Patch / fix

  • Unknown Post Grid Gutenberg Blocks and WordPress Blog Plugin 4.1.0
  • wpdownloadmanager gutenberg_blocks_for_wordpress_download_manager 4.1.0

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • wpscan.com https://wpscan.com/vulnerability/635be98d-4c17-4e75-871f-9794d85a2eb1/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 6.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L
CNA 3.1 6.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L

Affected products

  • Unknown Post Grid Gutenberg Blocks and WordPress Blog Plugin
  • wpdownloadmanager gutenberg_blocks_for_wordpress_download_manager

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation
Technology feeds

References

Sources

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.