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Fencer Intel
medium 6.1

CVE-2021-24316 json

Mediumish <= 1.0.47 - Unauthenticated Reflected Cross-Site Scripting (XSS)

published 5y ago modified 4mo ago also EUVD-2021-11230

cvss
6.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
6.4%
EPSS 6.4% chance of exploitation in 30 days, percentile 93%
public exploits
0
none known, plus a Nuclei check

Summary

The search feature of the Mediumish WordPress theme through 1.0.47 does not properly sanitise it's 's' GET parameter before output it back the page, leading to the Cross-SIte Scripting issue.

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Exploit prediction

6.44% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • Nuclei template WordPress Mediumish Theme <=1.0.47 - Cross-Site Scripting nuclei detection template
  • wpscan.com https://wpscan.com/vulnerability/57e27de4-58f5-46aa-9b59-809705733b2e referenced PoC, tagged "exploit" by a source, unverified
  • m0ze.ru https://m0ze.ru/vulnerability/%5B2021-03-14%5D-%5BWordPress%5D-%5BCWE-79%5D-Mediumish-WordPress-Theme-v1.0.47.txt referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Affected products

  • WowThemes Mediumish

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.