{"id":"CVE-2026-100159","revision":"46c6b3eb768e43df829de0751132529d","records":[{"revision":"46c6b3eb768e43df829de0751132529d","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-100159","aliases":[],"title":"Popup Box 6.4.1 - 6.4.2 - Unauthenticated Arbitrary Shortcode Execution via Client-IP / X-Forwarded-For HTTP Headers","description":"The Popup Box plugin for WordPress is vulnerable to Arbitrary Shortcode Execution in versions 6.4.1 to 6.4.2. This is due to the ays_popup_get_user_ip() function reading the client-controlled Client-IP / X-Forwarded-For / Forwarded / X-Forwarded / Forwarded-For request headers, sanitizing them only with sanitize_text_field() (which does not strip the bracket, quote, space, or '=' characters used by shortcode syntax), substituting the value into a popup body wherever the %%user_ip_address%% token appears (a raw str_replace with no escaping in Ays_Pb_Data::replace_message_variables()), and then passing the resulting body to do_shortcode() in Ays_Pb_Public::ays_autoembed() at output on the wp_footer hook. This makes it possible for unauthenticated attackers to execute arbitrary registered shortcodes with attacker-supplied attributes on the server whenever an administrator has added the %%user_ip_address%% token to a popup's Custom Content body, which can be leveraged to read arbitrary data or perform other actions exposed by shortcodes installed on the site.","state":0,"publishedAt":"2026-10-16T02:26:09.256+00:00","modifiedAt":"2026-10-16T15:09:41.509+00:00","affected":[{"ecosystem":"Vendor product","name":"Popup Box – Create Countdown, Coupon, Video, Contact Form Popups","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"ays-pro\",\n                    \"product\": \"Popup Box – Create Countdown, Coupon, Video, Contact Form Popups\",\n                    \"versions\": [\n                        {\n                            \"version\": \"6.4.1\",\n                            \"status\": \"affected\",\n                            \"lessThanOrEqual\": \"6.4.2\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","score":4.8,"severity":"MEDIUM"}],"references":["https://www.wordfence.com/threat-intel/vulnerabilities/id/535c4796-d1aa-4cd1-922e-f9dcf216f76d?source=cve","https://plugins.trac.wordpress.org/browser/ays-popup-box/tags/6.4.2/public/class-ays-pb-public.php#L3389","https://plugins.trac.wordpress.org/browser/ays-popup-box/tags/6.4.2/public/partials/ays-pb-public-templates.php#L4560","https://plugins.trac.wordpress.org/browser/ays-popup-box/tags/6.4.2/public/partials/ays-pb-public-templates.php#L4299","https://plugins.trac.wordpress.org/browser/ays-popup-box/tags/6.4.2/includes/class-ays-pb-data.php#L79","https://plugins.trac.wordpress.org/browser/ays-popup-box/tags/6.4.2/public/partials/ays-pb-public-templates.php#L69","https://plugins.trac.wordpress.org/browser/ays-popup-box/tags/6.4.3/public/class-ays-pb-public.php"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-100159","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-100159","identifiers":["CVE-2026-100159"]},"retained":false,"historicalAffected":[]}],"coverage":[]}