--- title: "CVE-2026-13354: Asset CleanUp: Page Speed Booster - Stored XSS" description: "Asset CleanUp: Page Speed Booster WordPress plugin <= 1.4.0.5 contains a stored cross-site scripting caused by insufficient input sanitization and output escaping in comment content, letting unauthenticated attackers inject scripts that execute on page access, exploit requires combine_loaded_css enabled." url: https://panop.io/threat-heartbeat/CVE-2026-13354/ --- # CVE-2026-13354 Asset CleanUp: Page Speed Booster - Stored XSS Asset CleanUp: Page Speed Booster WordPress plugin <= 1.4.0.5 contains a stored cross-site scripting caused by insufficient input sanitization and output escaping in comment content, letting unauthenticated attackers inject scripts that execute on page access, exploit requires combine\_loaded\_css enabled. CVSS base score 7.2 /10 High CISA KEV Not listed Public exploit None known Authentication Not required EPSS 0.24% chance of exploitation in 30 days [View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-13354) ## Details Type Stored XSS Impact Stored XSS CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N Published 19 September 2026 Updated 15 October 2026 Weakness [CWE-79](https://cwe.mitre.org/data/definitions/79.html) ## Vendor fix Update to the latest version of Asset CleanUp: Page Speed Booster plugin. Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them. ## References - [https://nvd.nist.gov/vuln/detail/CVE-2026-13354](https://nvd.nist.gov/vuln/detail/CVE-2026-13354) - [https://research.cleantalk.org/cve-2026-13354](https://research.cleantalk.org/cve-2026-13354) - [https://www.wordfence.com/threat-intel/vulnerabilities/id/4cc8ec2b-f203-4c7c-8720-043f8634a447?source=cve](https://www.wordfence.com/threat-intel/vulnerabilities/id/4cc8ec2b-f203-4c7c-8720-043f8634a447?source=cve) - [https://plugins.trac.wordpress.org/browser/wp-asset-clean-up/tags/1.4.0.3/classes/OptimiseAssets/OptimizeCss.php#L579](https://plugins.trac.wordpress.org/browser/wp-asset-clean-up/tags/1.4.0.3/classes/OptimiseAssets/OptimizeCss.php#L579) - [https://plugins.trac.wordpress.org/browser/wp-asset-clean-up/tags/1.4.0.3/classes/OptimiseAssets/OptimizeJs.php#L824](https://plugins.trac.wordpress.org/browser/wp-asset-clean-up/tags/1.4.0.3/classes/OptimiseAssets/OptimizeJs.php#L824) - [https://plugins.trac.wordpress.org/browser/wp-asset-clean-up/tags/1.4.0.4/classes/OptimiseAssets/OptimizeCss.php#L579](https://plugins.trac.wordpress.org/browser/wp-asset-clean-up/tags/1.4.0.4/classes/OptimiseAssets/OptimizeCss.php#L579) - [https://plugins.trac.wordpress.org/browser/wp-asset-clean-up/tags/1.4.0.4/classes/OptimiseAssets/OptimizeJs.php#L824](https://plugins.trac.wordpress.org/browser/wp-asset-clean-up/tags/1.4.0.4/classes/OptimiseAssets/OptimizeJs.php#L824) - [https://plugins.trac.wordpress.org/changeset?reponame=&old=3699024%40wp-asset-clean-up&new=3699024%40wp-asset-clean-up](https://plugins.trac.wordpress.org/changeset?reponame=&old=3699024%40wp-asset-clean-up&new=3699024%40wp-asset-clean-up) [← All CVEs](https://panop.io/threat-heartbeat/) ## What this record can't tell you - Whether you run the affected software, and where - Whether an attacker can actually reach and exploit it - The misconfigurations that never get a CVE number - What it would cost the business, ranked into what to fix first Panop answers these inside your environment, for this CVE and every other finding. [Book a demo](https://panop.io/demo)