CVE-2026-120739 json
Optimole <= 4.2.18 - Unauthenticated Stored Cross-Site Scripting via Page Profiler srcset Descriptor
published 2d ago modified 2d ago also EUVD-2026-118600
- cvss
- 7.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 27%
- public exploits
- 0
- none known
Summary
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.
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2d ago
Exploit prediction
0.34% chance of exploitation in the next 30 days, higher than 27% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
| NVD | 3.1 | 7.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
Affected products
- optimole Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/5d60007c-8957-4c46-8c5c-47b7f626f0bb?source=cve
- plugins.trac.wordpress.org /browser/optimole-wp/tags/4.2.17/inc/rest.php#L159
- plugins.trac.wordpress.org /browser/optimole-wp/tags/4.2.17/inc/rest.php#L1020
- plugins.trac.wordpress.org /browser/optimole-wp/tags/4.2.17/inc/tag_replacer.php#L529
- plugins.trac.wordpress.org /browser/optimole-wp/tags/4.2.17/inc/tag_replacer.php#L312
- plugins.trac.wordpress.org /browser/optimole-wp/tags/4.2.17/inc/manager.php#L519
- plugins.trac.wordpress.org /changeset?reponame=&old=3784828%40optimole-wp&new=3784828%40optimole-wp
Sources
- CVE List CVE-2026-120739
- NVD CVE-2026-120739
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