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Fencer Vulns
high 7.1

CVE-2024-39646 json

WordPress Custom 404 Pro plugin <= 3.11.1 - Reflected Cross Site Scripting (XSS) vulnerability

published 2024-08-01 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-38151

cvss
7.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits
0
none known, plus a Nuclei check

Summary

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Kunal Custom 404 Pro custom-404-pro.This issue affects Custom 404 Pro: from n/a through <= 3.11.1.

Patch / fix

  • Kunal Custom 404 Pro 3.11.2

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.62% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Nuclei template WordPress Custom 404 Pro <= 3.11.1 - Reflected XSS nuclei detection template

CVSS scores

assigned by version score vector
CNA 3.1 7.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

  • Kunal Custom 404 Pro

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.

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