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Fencer Vulns
medium 6.1

CVE-2021-25019 json

SEO Plugin by Squirrly SEO < 11.1.12 - Reflected Cross-Site Scripting

published 2022-03-21 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-11931

cvss
6.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 56%
public exploits
0
none known

Summary

The SEO Plugin by Squirrly SEO WordPress plugin before 11.1.12 does not escape the type parameter before outputting it back in an attribute in an admin page, leading to a Reflected Cross-Site Scripting

Patch / fix

  • squirrly seo_plugin_by_squirrly_seo 11.1.12

Exploit prediction

0.80% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • wpscan.com https://wpscan.com/vulnerability/cea0ce4b-886a-47cc-8653-a297e9759d09 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

  • Unknown SEO Plugin by Squirrly SEO

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.