{"schema":"threatline.record/2","record":{"id":"CVE-2026-17577","aliases":[],"summary":"SSL Zen <= 4.7.42 - Reflected Cross-Site Scripting via 'uri' Parameter","details":"The SSL Zen plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'uri' (and 'host') parameters in versions up to, and including, 4.7.42. The ssl_zen_messages::getMessages() function builds the 'token_missmatch' message using base64_decode(sanitize_text_field($_REQUEST['uri'])) and (optionally) base64_decode(sanitize_text_field($_REQUEST['host'])). sanitize_text_field() cannot strip HTML/JavaScript that is hidden inside a base64-encoded blob, and the resulting decoded raw HTML is echoed unescaped by showMessage() . This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a specially crafted link.","categories":["Unclassified"],"product":"SSL Zen — SSL Certificate Installer & HTTPS Redirects","vendor":"sslzen","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-17577","source_modified_at":"2026-09-25T10:31:39.758Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"SSL Zen — SSL Certificate Installer & HTTPS Redirects","vendor":"sslzen","versions":[{"version":"0","status":"affected","lessThanOrEqual":"4.7.42","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":6.1,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00274,"percentile":0.18739,"score_date":"2026-10-23"},"published_at":"2026-09-25T07:40:25.550Z","modified_at":"2026-09-25T10:31:39.758Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-17577","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-09-25T10:31:39.758Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-17577","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/20816039-0b1c-420a-b5f4-b5370d0331da?source=cve"},{"source":"CVE List","url":"https://plugins.trac.wordpress.org/browser/ssl-zen/tags/4.7.14/ssl_zen/classes/class.ssl_zen_messages.php#L44"},{"source":"CVE List","url":"https://plugins.trac.wordpress.org/browser/ssl-zen/tags/4.7.42/ssl_zen/classes/class.ssl_zen_admin.php#L863"},{"source":"CVE List","url":"https://plugins.trac.wordpress.org/browser/ssl-zen/tags/4.7.42/ssl_zen/classes/class.ssl_zen_messages.php#L44"},{"source":"CVE List","url":"https://plugins.trac.wordpress.org/browser/ssl-zen/tags/4.7.14/ssl_zen/classes/class.ssl_zen_admin.php#L863"},{"source":"CVE List","url":"https://plugins.trac.wordpress.org/changeset?reponame=&old=3701590%40ssl-zen&new=3701590%40ssl-zen"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-09-25T10:31:30.444491Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-09-25T10:31:39.758Z","content_hash":"9b6a287efc9c8ad6d79e6a04096fd799b3aecd72bb6507fd7ba376cf9537a363"}}