{"id":"CVE-2023-54413","kind":"vulnerability","aliases":["CVE-2023-54413"],"related":[],"title":"WPML Multilingual CMS: reflected XSS via wp_lang on login page","description":"WPML Multilingual CMS plugin for WordPress before 4.6.1 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject script by supplying crafted input in the wp_lang parameter. Attackers can lure users to /wp-login.php with a wp_lang value injecting an image input with an obfuscated onfocus handler to execute JavaScript in the victim's browser. Exploitation evidence was first observed by the Shadowserver Foundation on 2025-11-12.","summary":"WPML Multilingual CMS for WordPress before 4.6.1 reflects the wp_lang parameter into the login page without escaping. An unauthenticated attacker who lures a user to a crafted /wp-login.php link can run JavaScript in that user's browser.","severity":"medium","cvss":6.1,"epss":0.00211,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["package","self-hosted","wordpress","wpml"],"not_affected_if":["wpml-not-installed"],"how_to_check":"- Check the installed WPML version in the WordPress admin plugin list or in `wp-content/plugins/sitepress-multilingual-cms/sitepress.php`\n- Confirm whether the plugin is active on the site","fix":"- Update WPML Multilingual CMS to `4.6.1` or later","status":"open","published_at":"2026-10-22T11:17:05+00:00","first_seen_at":"2026-10-23T21:57:30+00:00","triaged_at":"2026-10-25T04:02:11+00:00","updated_at":"2026-10-25T04:02:11+00:00","category":"package","confidence":0.8,"triage":{"at":"2026-10-25T04:02:11Z","model":"claude-haiku-5-5","output":{"fix":"- Update WPML Multilingual CMS to `4.6.1` or later","reach":"internet","title":"WPML Multilingual CMS: reflected XSS via wp_lang on login page","impact":"medium","summary":"WPML Multilingual CMS for WordPress before 4.6.1 reflects the wp_lang parameter into the login page without escaping. An unauthenticated attacker who lures a user to a crafted /wp-login.php link can run JavaScript in that user's browser.","category":"package","nicknames":[],"who_cares":["wordpress","wpml","self-hosted"],"confidence":0.8,"needs_auth":"no","worst_case":"Attacker runs JavaScript in a victim's browser on the site","analyst_note":"Confirm the fixed version and any vendor advisory for 4.6.1; the sources give only the NVD and EPSS pages.","how_to_check":"- Check the installed WPML version in the WordPress admin plugin list or in `wp-content/plugins/sitepress-multilingual-cms/sitepress.php`\n- Confirm whether the plugin is active on the site","needs_analyst":true,"not_affected_if":["wpml-not-installed"],"who_is_affected":"Sites running the WPML Multilingual CMS plugin at a version before 4.6.1 are exposed, since the flaw sits in the login page the plugin serves. Sites without WPML, or with it at 4.6.1 or later, are not affected.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"medium"},"cost_usd":0.000611,"input_tokens":3439,"output_tokens":534,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-11':133C '-12':134C '-2023':13A,16A '-54413':14A,17A '/wp-login.php':52B,99C '2025':132C '4.6.1':30B,69C 'allow':79C 'attack':44B,81C,94C 'browser':61B,121C 'cms':3A,26B,64C 'contain':70C 'craft':51B,87C 'cross':74C 'cross-sit':73C 'cve':12A,15A 'escap':41B 'evid':123C 'execut':115C 'exploit':122C 'first':125C 'foundat':130C 'handler':113C 'host':21B 'imag':107C 'inject':83C,105C 'input':88C,108C 'javascript':56B,116C 'lang':8A,34B,92C,103C 'link':53B 'login':10A,38B 'lure':46B,96C 'multilingu':2A,25B,63C 'obfusc':111C 'observ':126C 'onfocus':112C 'packag':18B 'page':11A,39B 'paramet':35B,93C 'plugin':65C 'reflect':4A,31B,72C 'run':55B 'script':76C,84C 'self':20B 'self-host':19B 'shadowserv':129C 'site':75C 'suppli':86C 'unauthent':43B,80C 'user':48B,59B,97C 'valu':104C 'via':6A 'victim':119C 'vulner':77C 'without':40B 'wordpress':22B,28B,67C 'wp':7A,33B,91C,102C 'wpml':1A,23B,24B,62C 'xss':5A","nicknames":[],"mitigations":[],"who_affected":"Sites running the WPML Multilingual CMS plugin at a version before 4.6.1 are exposed, since the flaw sits in the login page the plugin serves. Sites without WPML, or with it at 4.6.1 or later, are not affected.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-22T11:17:05+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"disclosure@vulncheck.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2023-54413","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-54413","severity":null,"published_at":"2026-10-22T11:17:05+00:00","modified_at":"2026-10-22T17:40:46+00:00","first_seen_at":"2026-10-23T21:57:30+00:00","fetched_at":"2026-10-23T22:29:02+00:00","note":null},{"source":"epss","external_id":"CVE-2023-54413","url":"https://api.first.org/data/v1/epss?cve=CVE-2023-54413","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-24T07:15:51+00:00","fetched_at":"2026-10-24T07:15:51+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}