CVE-2025-49376: 
WordPress vulnerability analysis and mitigation

CVE-2025-49376 is a Missing Authorization (Broken Access Control) vulnerability in the DELUCKS SEO WordPress plugin that allows unauthenticated attackers to access functionality not properly constrained by ACLs. It affects all versions of the plugin through 2.5.9, with version 2.6.0 being the patched release. The vulnerability was reported on May 20, 2025, published by Patchstack on June 19, 2025, and received its CVE assignment on October 22, 2025. It carries a CVSS v3.1 base score of 5.3 (Medium) (Patchstack, Feedly).

The root cause is classified as CWE-862 (Missing Authorization), meaning the plugin fails to verify whether a requesting user has the appropriate permissions before executing certain privileged actions. This allows unauthenticated network-accessible attackers to invoke restricted functionality with low attack complexity and no user interaction required. No specific technical write-up or proof-of-concept code has been publicly disclosed beyond the Patchstack advisory (Patchstack).

Successful exploitation results in a limited integrity impact — unauthenticated attackers can perform actions that should be restricted to privileged users, such as modifying plugin settings or SEO-related configurations. There is no direct confidentiality or availability impact based on the CVSS scoring. The scope is limited to the affected WordPress installation, with no evidence of lateral movement potential or significant data exposure risk (Patchstack, Feedly).

No public proof-of-concept exploit code or evidence of in-the-wild exploitation has been reported for this vulnerability. The EPSS score is approximately 0.032%, indicating a very low probability of exploitation in the near term. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. Patchstack notes that vulnerabilities of this class are sometimes used in mass-exploit campaigns targeting WordPress plugins at scale, regardless of site popularity (Patchstack, Feedly).

The vendor has released version 2.6.0 of the DELUCKS SEO plugin, which resolves this vulnerability. Site administrators should update the plugin to version 2.6.0 or later immediately. Patchstack users can enable auto-update for vulnerable plugins as an additional safeguard. If an immediate update is not possible, site owners should consult their hosting provider or web developer for assistance (Patchstack).

The vulnerability was discovered by researcher ch4r0n and disclosed through Patchstack's coordinated vulnerability disclosure process. Patchstack classifies this as low priority with unlikely exploitation impact. No notable broader media coverage or significant community discussion has been identified beyond the standard advisory publication (Patchstack).