Medium severity · published Oct 31, 2026
CVE-2026-109367
All in One SEO <= 5.0.3 - Unauthenticated Sensitive Information Disclosure in 's' Search Query Parameter
New
5.3
CVSS
0.3%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 20% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AI
All in One SEO – AI SEO Plugin to Boost SEO Rankings & Traffic (Schema, Local SEO, Sitemap & SEO Insights) · smub
through 5.0.3 · source: vendor
Affected product
AI
All in One SEO – AI SEO Plugin to Boost SEO Rankings & Traffic (Schema, Local SEO, Sitemap & SEO Insights)
smub
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-109367
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-109367
www.wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/75510022-382c-4d03-9c59-1d06349e72bb?source=cve
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/all-in-one-seo-pack/tags/5.0.3/app/Common/Utils/Tags.php#L1494
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/all-in-one-seo-pack/tags/5.0.3/app/Common/Utils/Tags.php#L1393
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/all-in-one-seo-pack/tags/5.0.3/app/Common/Utils/Tags.php#L965
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/all-in-one-seo-pack/tags/5.0.3/app/Common/Utils/Tags.php#L1214
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/all-in-one-seo-pack/tags/5.0.3/app/Common/Meta/Title.php#L116
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