WP Meta SEO <= 4.5.4 - Authenticated (Author+) PHAR Deserialization

8.8
Deserialization of Untrusted Data
CVE CVE-2023-1381
CVSS 8.8 (High)
Publicly Published March 27, 2023
Last Updated January 22, 2024
Researcher Alex Sanford

Description

The WP Meta SEO plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 4.5.4 due to insufficient file path validation that makes it possible for attackers to supply paths to files with a phar:// wrapper that will unserialize during retrieval. This makes it possible for authenticated attackers, with author-level permissions and above, to inject a PHP Object. The plugin does contain a useable gadget chain that may make remote execution possible.

References

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Vulnerability Details for WP Meta SEO

Software Type Plugin
Software Slug wp-meta-seo (view on wordpress.org)
Patched? Yes
Remediation Update to version 4.5.5, or a newer patched version
Affected Version
  • <= 4.5.4
Patched Version
  • 4.5.5

Recent vulnerabilities in WP Meta SEO

# Title CVE ID CVSS Researchers Date
1 WP Meta SEO <= 4.5.18 - Authenticated (Contributor+) Server-Side Request Forgery via 'new_link' Parameter CVE-2026-11370 6.4 Enes Ismail June 23, 2026
2 WP Meta SEO <= 4.5.18 - Unauthenticated Stored Cross-Site Scripting via REQUEST_URI in 404 Logging CVE-2026-9643 7.2 zedeq June 23, 2026
3 WP Meta SEO <= 4.5.13 - Authenticated (Contributor+) Stored Cross-Site Scripting CVE-2024-45456 6.4 Robert DeVore September 12, 2024
4 WP Meta SEO <= 4.5.13 - Authenticated (Administrator+) Stored Cross-Site Scripting CVE-2024-45455 4.4 Robert DeVore September 12, 2024
5 WP Meta SEO <= 4.5.12 - Unauthenticated Stored Cross-Site Scripting via Referer header CVE-2023-6961 7.2 Krzysztof Zając April 16, 2024
6 WP Meta SEO <= 4.5.12 - Information Exposure via Meta Description CVE-2023-6962 5.3 Krzysztof Zając April 16, 2024
7 WP Meta SEO <= 4.5.3 - Missing Authorization in 'wpmsGGSaveInformation' CVE-2023-1022 5.4 Marco Wotschka February 24, 2023
8 WP Meta SEO <= 4.5.3 - Missing Authorization in 'saveSitemapSettings' CVE-2023-1023 5.4 Marco Wotschka February 24, 2023
9 WP Meta SEO <= 4.5.3 - Missing Authorization in 'listPostsCategory' CVE-2023-1026 4.3 Marco Wotschka February 24, 2023
10 WP Meta SEO <= 4.5.3 - Cross-Site Request Forgery via 'setIgnore' CVE-2023-1028 4.3 Marco Wotschka February 24, 2023

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