The Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 's (missing_srcsets[*][*].s)' parameter in all versions up to, and including, 4.2.18 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. The HMAC signature required to pass the REST endpoint's authorization check is published in plaintext to unauthenticated visitors inside the inline optimoleDataOptimizer JavaScript object on any page with an incomplete profile, making the effective authentication barrier nonexistent.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
optimole Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization unaffected
Version Status Constraints
0 affected ≤ 4.2.18

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://plugins.trac.wordpress.org/browser/optimole-wp/tags/4.2.17/inc/manager.php#L519 cve-icon
https://plugins.trac.wordpress.org/browser/optimole-wp/tags/4.2.17/inc/rest.php#L1020 cve-icon
https://plugins.trac.wordpress.org/browser/optimole-wp/tags/4.2.17/inc/rest.php#L159 cve-icon
https://plugins.trac.wordpress.org/browser/optimole-wp/tags/4.2.17/inc/tag_replacer.php#L312 cve-icon
https://plugins.trac.wordpress.org/browser/optimole-wp/tags/4.2.17/inc/tag_replacer.php#L529 cve-icon
https://plugins.trac.wordpress.org/changeset?reponame=&old=3784828%40optimole-wp&new=3784828%40optimole-wp cve-icon
https://www.wordfence.com/threat-intel/vulnerabilities/id/5d60007c-8957-4c46-8c5c-47b7f626f0bb?source=cve cve-icon
History

Sat, 07 Nov 2026 03:45:00 +0000

Type Values Removed Values Added
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 's (missing_srcsets[*][*].s)' parameter in all versions up to, and including, 4.2.18 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. The HMAC signature required to pass the REST endpoint's authorization check is published in plaintext to unauthenticated visitors inside the inline optimoleDataOptimizer JavaScript object on any page with an incomplete profile, making the effective authentication barrier nonexistent.
Title Optimole <= 4.2.18 - Unauthenticated Stored Cross-Site Scripting via Page Profiler srcset Descriptor
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 7.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'}

Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: Wordfence

Published:

Updated: 2026-11-07T03:28:05.491Z

Reserved: 2026-11-02T20:39:19.305Z

Link: CVE-2026-120739

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses