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Fencer Intel
medium 5.4

CVE-2021-24176 json

JH 404 Logger <= 1.1 - Unauthenticated Stored Cross-Site Scripting (XSS)

published 5y ago modified 4mo ago also EUVD-2021-11090

cvss
5.4
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.0%
EPSS 2.0% chance of exploitation in 30 days, percentile 81%
public exploits
0
none known, plus a Nuclei check

Summary

The JH 404 Logger WordPress plugin through 1.1 doesn't sanitise the referer and path of 404 pages, when they are output in the dashboard, which leads to executing arbitrary JavaScript code in the WordPress dashboard.

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Exploit prediction

2.04% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • Nuclei template WordPress JH 404 Logger <=1.1 - Cross-Site Scripting nuclei detection template
  • wpscan.com https://wpscan.com/vulnerability/705bcd6e-6817-4f89-be37-901a767b0585 referenced PoC, tagged "exploit" by a source, unverified
  • ganofins.com https://ganofins.com/blog/my-first-cve-2021-24176/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:N/I:P/A:N

Affected products

  • Unknown JH 404 Logger

Classification

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

References

Sources

Fencer Intel 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.