CVE-2026-22479: 
WordPress vulnerability analysis and mitigation

CVE-2026-22479 is a Missing Authorization vulnerability in the ThemeRuby Easy Post Submission WordPress plugin that allows unauthenticated attackers to exploit incorrectly configured access control security levels. The vulnerability affects Easy Post Submission versions up to and including 2.4.0 (per NVD) or 2.2.0 (per EUVD/Patchstack). It was published on March 5, 2026, and assigned a CVSS v3.1 base score of 7.5 (High) (Feedly, Patchstack).

The root cause is classified as CWE-862 (Missing Authorization), meaning the plugin fails to properly verify whether a requesting user has the necessary permissions before executing sensitive actions. The attack vector is network-based, requires no authentication, no user interaction, and has low attack complexity, making it trivially exploitable by any remote attacker. The vulnerability falls under the CAPEC-665 pattern of exploiting incorrectly configured access control security levels (Feedly).

Successful exploitation results in a high integrity impact with no confidentiality or availability impact, meaning attackers can perform unauthorized write or modification actions on the affected WordPress site without authentication. This could allow attackers to submit or manipulate post content, potentially injecting malicious content into the site or abusing the post submission workflow. The scope is limited to the affected plugin's functionality on the host WordPress installation (Feedly).

No public proof-of-concept exploit code or in-the-wild exploitation has been reported for CVE-2026-22479 as of the available data. The EPSS score is approximately 0.017% (0.000170), indicating a very low probability of exploitation in the near term. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, and no threat actor attribution has been identified (Feedly).

Users of the Easy Post Submission plugin by ThemeRuby should update to a version beyond 2.4.0 (or 2.2.0 per Patchstack) as soon as a patched release is made available by the vendor. In the interim, site administrators should consider deactivating or removing the plugin if it is not critical to site operations. Monitoring WordPress admin logs for unexpected post submissions or unauthorized access attempts is also recommended (Patchstack).