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CVE-2026-1928— Rank Math SEO <= 1.0.276 - Authenticated (Contributor+) PHP Object Injection to Remote Code Execution

Quick assessment

Affected
rankmath Rank Math SEO – AI SEO Tools to Dominate SEO Rankings
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress 插件"Rank Math SEO – AI SEO Tools to Dominate SEO Rankings"在所有 1.0.276 及更早版本中，存在 PHP 对象注入漏洞。该漏洞源于 REST API 端点对不可信输入进行反序列化操作。拥有 Contributor（贡献者）及以上权限的已认证攻击者可利用此漏洞注入 PHP 对象。由于存在相应的 PHP 对象利用链（POP chain），攻击者进一步可通过向 uploads 目录写入 Webshell，实现远程代码执行。

CVSS 8.8 · High
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I. Basic Information for CVE-2026-1928

Vulnerability Information
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Vulnerability Title
Rank Math SEO <= 1.0.276 - Authenticated (Contributor+) PHP Object Injection to Remote Code Execution
Source: CVE Program / CVE List V5
Vulnerability Description
The Rank Math SEO – AI SEO Tools to Dominate SEO Rankings plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 1.0.276 via deserialization of untrusted input in the updateMeta REST API endpoint. This makes it possible forauthenticated attackers, with Contributor-level access and above, to inject a PHP Object. The additional presence of a POP chain allows attackers to achieve remote code execution by writing a webshell to the uploads directory.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
rankmath Rank Math SEO – AI SEO Tools to Dominate SEO Rankings 0 ~ 1.0.276 -

II. Public POCs for CVE-2026-1928

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III. Intelligence Information for CVE-2026-1928

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Other References for CVE-2026-1928 (5)

IV. Related Vulnerabilities

Same product: Rank Math SEO – AI SEO Tools to Dominate SEO Rankings
Same vendor: rankmath
Same weakness: CWE-502