CVE-2026-8832

CVE-2026-8832 is a high-severity vulnerability with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-94.

Key facts

• Severity: High (CVSS 3.x base score 8.8)
• EPSS exploit prediction: 1% (65th percentile)
• Actively exploited: Not listed in CISA KEV
• EU (EUVD) id: EUVD-2026-32100
• Weakness: CWE-94
• Published: 2026-05-27
• Last modified: 2026-06-17

Description

The WPCode - Insert Headers and Footers + Custom Code Snippets - WordPress Code Manager plugin for WordPress is vulnerable to Remote Code Execution in versions up to, and including, 2.3.5 This is due to the 'wpcode' custom post type being registered without a custom capability_type or capability restrictions in the wpcode_register_post_type() function, allowing WordPress core to fall back to standard post capabilities for all creation paths including XML-RPC. This makes it possible for authenticated attackers, with author-level access and above, to create and publish executable PHP snippet posts via XML-RPC wp.newPost, which are then executed server-side via eval() in the run_eval() function when the snippet is rendered through the [wpcode] shortcode.

Frequently asked questions

What is CVE-2026-8832?

The WPCode - Insert Headers and Footers + Custom Code Snippets - WordPress Code Manager plugin for WordPress is vulnerable to Remote Code Execution in versions up to, and including, 2.3.5 This is due to the 'wpcode' custom post type being registered without a custom capability_type or capability restrictions in the wpcode_register_post_type() function, allowing WordPress core to fall back to standard post capabilities for all creation paths including XML-RPC. This makes it possible for authenticated attackers, with author-level access and above, to create and publish executable PHP snippet posts via XML-RPC wp.newPost, which are then executed server-side via eval() in the run_eval() function when the snippet is rendered through the [wpcode] shortcode.

How severe is CVE-2026-8832?

CVE-2026-8832 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-8832 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-8832?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-8832 have an EU (EUVD) identifier?

Yes. CVE-2026-8832 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-32100.

When was CVE-2026-8832 published?

CVE-2026-8832 was published on 2026-05-27 and last updated on 2026-06-17.

References

• https://plugins.trac.wordpress.org/browser/insert-headers-and-footers/tags/2.3.5/includes/class-wpcode-snippet-execute.php#L374
• https://plugins.trac.wordpress.org/browser/insert-headers-and-footers/tags/2.3.5/includes/class-wpcode-snippet-execute.php#L415
• https://plugins.trac.wordpress.org/browser/insert-headers-and-footers/tags/2.3.5/includes/execute/class-wpcode-snippet-execute-php.php#L25
• https://plugins.trac.wordpress.org/browser/insert-headers-and-footers/tags/2.3.5/includes/post-type.php#L24
• https://plugins.trac.wordpress.org/browser/insert-headers-and-footers/tags/2.3.5/includes/shortcode.php#L26
• https://plugins.trac.wordpress.org/changeset/3549060/insert-headers-and-footers/trunk/includes/post-type.php
• https://plugins.trac.wordpress.org/changeset?old_path=%2Finsert-headers-and-footers/tags/2.3.5&new_path=%2Finsert-headers-and-footers/tags/2.3.6
• https://www.wordfence.com/threat-intel/vulnerabilities/id/75a2e8b1-d5e0-4f7b-a70a-f0aadf58c778?source=cve

Other CWE-94 (Code Injection) vulnerabilities

• CVE-2026-57624 — Critical (CVSS 10.0): Unauthenticated Remote Code Execution (RCE) in Blocksy Companion Pro <= 2.1.46 versions.
• CVE-2026-10134 — Critical (CVSS 10.0): IBM Langflow OSS 1.0.0 through 1.9.3 allows an attacker to read every secret available to the Langflow process, read…
• CVE-2026-53576 — Critical (CVSS 10.0): Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, the authentication filter…
• CVE-2026-10561 — Critical (CVSS 10.0): IBM Langflow OSS 1.0.0 through 1.9.3 has an vulnerability due to an improper isolation of Python execution combined…
• CVE-2026-25470 — Critical (CVSS 10.0): Improper Control of Generation of Code ('Code Injection') vulnerability in ACPT ACPT (Pro) - Custom Post Types Plugin…
• CVE-2026-48836 — Critical (CVSS 10.0): Unauthenticated Remote Code Execution (RCE) in Easy Invoice <= 2.1.19 versions.

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