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Fencer Vulns
high 8.8

CVE-2021-25036 json

All In One SEO < 4.1.5.3 - Authenticated Privilege Escalation

published 2022-01-17 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-11948

cvss
8.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.0%
EPSS 3.0% chance of exploitation in 30 days, percentile 87%
public exploits
0
none known

Summary

The All in One SEO WordPress plugin before 4.1.5.3 is affected by a Privilege Escalation issue, which was discovered during an internal audit by the Jetpack Scan team, and may grant bad actors access to protected REST API endpoints they shouldn’t have access to. This could ultimately enable users with low-privileged accounts, like subscribers, to perform remote code execution on affected sites.

Patch / fix

  • aioseo all_in_one_seo 4.1.5.3

Exploit prediction

3.03% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • wpscan.com https://wpscan.com/vulnerability/6de4a7de-6b71-4349-8e52-04c89c5e6d6c referenced PoC, tagged "exploit" by a source, unverified
  • jetpack.com https://jetpack.com/2021/12/14/severe-vulnerabilities-fixed-in-all-in-one-seo-plugin-version-4-1-5-3/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.5 AV:N/AC:L/Au:S/C:P/I:P/A:P

Affected products

  • Unknown All in One SEO – Best WordPress SEO Plugin – Easily Improve SEO Rankings & Increase Traffic

Classification

Weakness
  • CWE-287 Improper Authentication
  • CWE-178 Improper Handling of Case Sensitivity
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.