Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization (<= 4.2.18) - CraftedSignal Threat Feedhttps://feed.craftedsignal.io/products/optimole--optimize-images--convert-webp--avif--cdn--lazy-load--image-optimization--4.2.18/Trending threats, MITRE ATT&CK coverage, and detection metadata. Fed continuously.Hugoenhello@craftedsignal.iohello@craftedsignal.ioSat, 07 Nov 2026 05:59:28 +0000https://feed.craftedsignal.io/favicon-32x32.pngCraftedSignal Threat Feedhttps://feed.craftedsignal.io/3232https://feed.craftedsignal.io/favicon.svgOptimole: Stored XSS via missing_srcsets parameter (CVE-2026-120739)https://feed.craftedsignal.io/briefs/2026-11-optimole-xss-432d9959/Sat, 07 Nov 2026 05:59:28 +0000hello@craftedsignal.iohttps://feed.craftedsignal.io/briefs/2026-11-optimole-xss-432d9959/The Optimole WordPress plugin up to version 4.2.18 is vulnerable to Stored Cross-Site Scripting (XSS) due to insufficient sanitization, allowing unauthenticated attackers to exploit a leaked HMAC signature and inject malicious scripts.The Optimole plugin for WordPress, specifically versions 4.2.18 and earlier, contains a Stored Cross-Site Scripting (XSS) vulnerability. The flaw stems from insufficient input sanitization and output escaping within the 'missing_srcsets' parameter. Furthermore, the plugin unintentionally exposes a required HMAC signature in plaintext via the 'optimoleDataOptimizer' JavaScript object to any unauthenticated visitor on pages with an incomplete profile, rendering the REST API authentication mechanism ineffective.

Impact

Successful exploitation allows unauthenticated attackers to inject arbitrary web scripts into pages. These scripts execute in the context of the user viewing the affected page, which could lead to unauthorized actions, session hijacking, or credential theft if an administrator views the injected content.

Recommendation

  • Upgrade the Optimole plugin to a version beyond 4.2.18 immediately to remediate the input sanitization flaw.
  • Implement a Content Security Policy (CSP) to mitigate the impact of potential XSS attacks by restricting the execution of unauthorized inline scripts.
  • Audit logs for suspicious REST API requests targeting the Optimole plugin endpoints, particularly those originating from unauthorized or anonymous user agents.
]]>highadvisorywordpressxssweb-applicationcmsOptimole WordPress Plugin: Stored Cross-Site Scripting (CVE-2026-120677)https://feed.craftedsignal.io/briefs/2026-11-optimole-xss-72402503/Sat, 07 Nov 2026 05:59:20 +0000hello@craftedsignal.iohttps://feed.craftedsignal.io/briefs/2026-11-optimole-xss-72402503/The Optimole WordPress plugin (versions up to and including 4.2.18) is vulnerable to Stored Cross-Site Scripting via the 'comment' parameter due to insufficient input sanitization and output escaping.The Optimole - Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization plugin for WordPress is vulnerable to Stored Cross-Site Scripting (XSS) via the 'comment' parameter in all versions up to, and including, 4.2.18.

An unauthenticated attacker can inject arbitrary web scripts into pages. Execution occurs when a user accesses an injected page, provided the comment has been approved by an administrator and the post contains an iframe or video element, which triggers the plugin's video lazy loading functionality.

Impact

Successful exploitation allows for the execution of arbitrary web scripts in the user's browser.

CVE Details

  • ID: CVE-2026-120677
  • CVSS v3.1 Base Score: 7.2
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