CVE-2025-13537

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{"analysis": {"en": {"generated_at": "2026-04-21T00:43:33.290791+00:00", "value": {"mitigation_remediation": ["Update the Live Composer plugin to the latest version (\u2265 2.0.3) which resolves the input sanitization issue.", "If an immediate upgrade is not possible, remove or neutralize custom attributes that accept user input from pages built with the plugin, or revoke contributor permissions for users who can edit these pages.", "Deploy a Content Security Policy that blocks inline scripts for the pages served by the plugin as a temporary mitigation until the patch is applied."], "summary": {"action": "Apply Patch", "impact": "Stored Cross\u2011Site Scripting (client\u2011side script execution)"}, "threat_synthesis": {"affected_systems": "All installations of the Live Composer \u2013 Free WordPress Website Builder plugin up to and including version 2.0.2 are affected. Users running any earlier or later versions are not impacted by this flaw.", "description_and_impact": "The Live Composer plugin contains several DOM\u2011based stored cross\u2011site scripting flaws caused by insufficient sanitization of user\u2011supplied attributes. Authenticated contributors or higher can embed arbitrary JavaScript into page elements. When any visitor loads the affected page, the injected script runs in their browser, enabling attackers to steal session tokens, deface content, or phish for credentials. The vulnerability does not grant direct code execution on the server, but it provides a powerful client\u2011side attack surface useful for credential theft and further exploitation.", "risk_and_exploitability": "With a CVSS score of 6.4, the vulnerability is considered moderate severity. The EPSS score, currently less than 1%, indicates a low probability of exploitation, and the flaw is not listed in the CISA KEV catalog. Authentication is required: an attacker must have contributor-level access or higher to inject the malicious script. The stored nature of the payload means the impact depends on who views the page, making the risk significant for sites with many visitors but limited to those who accrue contributor privileges."}}}}, "created": "2025-12-18T09:57:09.593361+00:00", "updated": "2026-04-21T00:45:23.101773+00:00", "vendors": ["livecomposer", "livecomposer$PRODUCT$live_composer", "wordpress", "wordpress$PRODUCT$wordpress"]}