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Vulnerability details

CVE-2026-120739

Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization

Optimole <= 4.2.18 - Unauthenticated Stored Cross-Site Scripting via Page Profiler srcset Descriptor

CVSS 3.1
7.2High

Official 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.

CVSS scores

ScoreVersionSourceVector
7.2High 3.1 CVEProject cvelistV5 (CNA) (Wordfence) CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Affected products

VendorProductVersionsSource
Optimole Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization v ≤ 4.2.18 CVEProject cvelistV5 (CNA)

References and advisories

7
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Details

Published
2026-11-07
Last updated
2026-11-07
State
Published
Assigner (CNA)
Wordfence

Exploit prediction (EPSS)

0.34%
Probability of exploitation in 30 days
27.7%
Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable
No
Exploitation
None
Technical impact
Partial

Weaknesses (CWE)

  • CWE-79
    Improper Neutralization of Input During Web Page Generation