{"id":"CVE-2026-19855","aliases":["EUVD-2026-74721","GHSA-5543-49w7-m8jw"],"status":"published","title":"Spam protection, Honeypot, Anti-Spam by CleanTalk \u003c 6.87 - Unauthenticated Arbitrary Shortcode Execution via Comment Text","description":"The CleanTalk WordPress plugin before 6.87 does not prevent unauthenticated, user-supplied comment content from being passed to WordPress's shortcode engine, allowing any visitor to have arbitrary shortcodes registered on the site executed server-side and rendered to every subsequent visitor of the page.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00306,"percentile":0.23662,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-74"],"published":"2026-09-09T06:25:05Z","modified":"2026-09-09T18:31:58Z","products":[{"vendor":"unknown","product":"cleantalk"}],"references":[{"url":"https://wpscan.com/vulnerability/c27f3657-261a-46cd-860c-0bdf5c849190/","tags":["exploit","vdb-entry","technical-description"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-19855"},{"url":"https://wpscan.com/vulnerability/c27f3657-261a-46cd-860c-0bdf5c849190"},{"url":"https://github.com/advisories/GHSA-5543-49w7-m8jw"}],"sources":{"cve":[{"id":"CVE-2026-19855","title":"Spam protection, Honeypot, Anti-Spam by CleanTalk \u003c 6.87 - Unauthenticated Arbitrary Shortcode Execution via Comment Text","description":"The CleanTalk WordPress plugin before 6.87 does not prevent unauthenticated, user-supplied comment content from being passed to WordPress's shortcode engine, allowing any visitor to have arbitrary shortcodes registered on the site executed server-side and rendered to every subsequent visitor of the page.","status":"published","published":"2026-09-09T06:25:05.235Z","modified":"2026-09-09T15:23:18.45Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-74"],"updated_at":"2026-11-02T13:47:17.512524Z"}],"euvd":[{"id":"EUVD-2026-74721","description":"The CleanTalk WordPress plugin before 6.87 does not prevent unauthenticated, user-supplied comment content from being passed to WordPress's shortcode engine, allowing any visitor to have arbitrary shortcodes registered on the site executed server-side and rendered to every subsequent visitor of the page.","status":"published","published":"2026-09-09T06:25:05Z","modified":"2026-09-09T15:23:18Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T17:28:26.882462Z"}],"ghsa":[{"id":"GHSA-5543-49w7-m8jw","title":"The CleanTalk WordPress plugin before 6.87 does not prevent unauthenticated, user-supplied...","description":"The CleanTalk WordPress plugin before 6.87 does not prevent unauthenticated, user-supplied comment content from being passed to WordPress's shortcode engine, allowing any visitor to have arbitrary shortcodes registered on the site executed server-side and rendered to every subsequent visitor of the page.","status":"published","published":"2026-09-09T09:32:57Z","modified":"2026-09-09T18:31:58Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-74"],"updated_at":"2026-11-02T15:11:39.437162Z"}],"nvd":[{"id":"CVE-2026-19855","description":"The CleanTalk WordPress plugin before 6.87 does not prevent unauthenticated, user-supplied comment content from being passed to WordPress's shortcode engine, allowing any visitor to have arbitrary shortcodes registered on the site executed server-side and rendered to every subsequent visitor of the page.","status":"published","published":"2026-09-09T07:16:56.5Z","modified":"2026-09-09T16:17:02.25Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-74"],"updated_at":"2026-11-02T14:12:45.93749Z"}]}}