{"id":"CVE-2021-4050","aliases":["BIT-livehelperchat-2021-4050","EUVD-2021-2491","GHSA-97cc-825c-399g"],"status":"published","title":"Cross-site Scripting (XSS) - Stored in livehelperchat/livehelperchat","description":"livehelperchat is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","severity":{"version":"3.0","score":6.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00878,"percentile":0.59311,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2021-12-08T10:45:12Z","modified":"2026-10-20T10:54:55Z","affected":[{"source":"ghsa","ecosystem":"Packagist","package":"remdex/livehelperchat","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"2.0"}]}]},{"source":"osv","ecosystem":"Bitnami","package":"livehelperchat"},{"source":"osv","ecosystem":"Packagist","package":"remdex/livehelperchat","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"2.0"}]}],"versions":["1.74","1.81","1.82","1.83","1.84","1.85","1.86","1.87","1.88","1.89","1.90","1.91","1.93","1.94","1.95","1.98","2.0"]}],"products":[{"vendor":"livehelperchat","product":"live_helper_chat"},{"vendor":"livehelperchat","product":"livehelperchat/livehelperchat"}],"references":[{"url":"https://huntr.dev/bounties/27eb39d7-7636-4c4b-922c-a2f8fbe1ba05","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Third Party Advisory","web","evidence"]},{"url":"https://github.com/livehelperchat/livehelperchat/commit/0ce1dd2a13509747c240c8484228a5df8d6e03ec","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","web","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-4050","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-97cc-825c-399g"}],"sources":{"cve":[{"id":"CVE-2021-4050","title":"Cross-site Scripting (XSS) - 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