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Fencer Vulns
high 8.8

CVE-2023-1381 json

WP Meta SEO < 4.5.5 - Author+ PHAR Deserialization

published 2023-04-10 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-23637

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.7%
EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits
0
none known

Summary

The WP Meta SEO WordPress plugin before 4.5.5 does not validate image file paths before attempting to manipulate the image files, leading to a PHAR deserialization vulnerability. Furthermore, the plugin contains a gadget chain which may be used in certain configurations to achieve remote code execution.

Patch / fix

  • Unknown WP Meta SEO 4.5.5

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
20 mo ago

Exploit prediction

1.69% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • wpscan.com https://wpscan.com/vulnerability/f140a928-d297-4bd1-8552-bfebcedba536 referenced PoC, tagged "exploit" by a source, unverified
  • blog.wpscan.com https://blog.wpscan.com/uncovering-a-phar-deserialization-vulnerability-in-wp-meta-seo-and-escalating-to-rce/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Unknown WP Meta SEO

Classification

Weakness
  • CWE-502 Deserialization of Untrusted Data
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.