CVE-2026-109367
MediumCVSS 5.3Exploitation Probability (EPSS)
Low risk20th percentile - higher than 20% of all known CVEs
Summary
The All in One SEO plugin for WordPress in versions up to and including 5.0.3 is vulnerable to Sensitive Information Exposure via the 's' parameter. Unauthenticated attackers can extract arbitrary non-public post meta values, including sensitive custom fields such as API keys and internal notes, which are emitted verbatim into the HTML title element and JSON-LD SearchResultsPage schema.
Risk Assessment
Exposure of API keys and internal notes can lead to unauthorized access to external services and leakage of internal organizational information. The vulnerability is easy to exploit without authentication.
Recommendation
Update the All in One SEO plugin to a version later than 5.0.3. Until updated, consider disabling the plugin or restricting access to the site.
Other vulnerabilities in All in One SEO
See all- CVE-2026-100152Medium
The All in One SEO plugin for WordPress is vulnerable to arbitrary shortcode execution in all versions up to, and including, 5.0.2. An unauthenticated attacker can execute arbitrary shortcodes, which requires the AIOSEO breadcrumb to be rendered on the search results page.
- CVE-2026-19856Medium
The All in One SEO WordPress plugin before 5.0.2.1 does not correctly determine which shortcodes are present in content derived from user input before deciding which ones to strip. This allows unauthenticated users to execute arbitrary shortcodes registered on the site, and on sites upgraded from older versions the protection is disabled outright.
- CVE-2026-85492Medium
The All in One SEO plugin for WordPress up to version 5.0.1.1 is vulnerable to DOM-Based Cross-Site Scripting via URL Pathname. Insufficient input sanitization and output escaping allow unauthenticated attackers to inject scripts. Exploitation requires the victim to have aioseo_manage_seo capability and open the SEO Preview panel.
- CVE-2026-10755Low
The All in One SEO WordPress plugin before version 4.9.9 does not correctly restrict access to some of its AI integration REST API endpoints, allowing users with low-level privileges such as Contributors to overwrite or reset the site-wide AI integration state.
- CVE-2026-5075Medium
The All in One SEO plugin for WordPress up to version 4.9.7 exposes sensitive internal option data via 'internalOptions' localized script data passed to wp_localize_script() in post editor contexts. Lack of effective masking for low-privilege users allows authenticated attackers with Contributor-level access or higher to view configured API/OAuth tokens and license-related values from the page source.
- CVE-2025-12847Medium
The All in One SEO – Powerful SEO Plugin to Boost SEO Rankings & Increase Traffic plugin for WordPress is vulnerable to unauthorized arbitrary media attachment deletion due to a missing authorization check in all versions up to, and including, 4.8.9. This is due to the REST API endpoint `/wp-json/aioseo/v1/ai/image-generator` only verifying that users have the `edit_posts` capability (Contributors and above) without checking if they own or have permission to delete the specific media attachments. This makes it possible for authenticated attackers, with Contributor-level access and above, to permanently delete arbitrary media attachments by ID via the REST API, granted they can determine valid attachment IDs.
Original NVD description (English source)
The All in One SEO – AI SEO Plugin to Boost SEO Rankings & Traffic (Schema, Local SEO, Sitemap & SEO Insights) plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 5.0.3 via the 's' parameter. This makes it possible for unauthenticated attackers to extract arbitrary non-public post meta values, including sensitive custom fields such as API keys and internal notes, emitted verbatim into the HTML title element and JSON-LD SearchResultsPage schema.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS