High severity · published Aug 28, 2026
CVE-2026-77365
Optimole <= 4.2.10 - Unauthenticated Stored Cross-Site Scripting via 'a' (above_fold_images) Parameter
7.2
CVSS
0.5%
EPSS
No
On KEV
Description
The Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'a' (above_fold_images) parameter in all versions up to, and including, 4.2.10 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 45% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OO
Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization · optimole
through 4.2.10 · source: vendor
Affected product
OO
Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization
optimole
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-77365
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-77365
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/optimole-wp/tags/4.2.10/inc/manager.php#L468
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/optimole-wp/tags/4.2.10/inc/rest.php#L159
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/optimole-wp/tags/4.2.10/inc/rest.php#L935
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/optimole-wp/tags/4.2.10/inc/v2/PageProfiler/Profile.php#L189
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/optimole-wp/tags/4.2.10/inc/v2/PageProfiler/Profile.php#L485
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/optimole-wp/tags/4.2.7/inc/manager.php#L468
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