{"id":"CVE-2021-4121","aliases":["EUVD-2021-2542","GHSA-j85f-xw9x-ffwp"],"status":"published","title":"Cross-site Scripting (XSS) - Stored in yetiforcecompany/yetiforcecrm","description":"yetiforcecrm is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","severity":{"version":"3.0","score":6.4,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.0079,"percentile":0.56528,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2021-12-16T07:35:10Z","modified":"2026-10-20T10:53:58Z","affected":[{"source":"ghsa","ecosystem":"Packagist","package":"yetiforce/yetiforce-crm","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"6.3.0"}]}]},{"source":"osv","ecosystem":"Packagist","package":"yetiforce/yetiforce-crm","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"6.3.0"}]}],"versions":["4.0.0","4.1.0","4.2.0","4.3.0","4.4.0","4.4.0_RC1","4.4.0_RC2","4.4.0_RC3","5.0.0","5.1.0","5.2.0","5.3.0","6.0.0","6.0.0a","6.1.0","6.2.0","6.3.0"]}],"products":[{"vendor":"yetiforce","product":"yetiforce_customer_relationship_management"},{"vendor":"yetiforcecompany","product":"yetiforcecompany/yetiforcecrm"}],"references":[{"url":"https://huntr.dev/bounties/6da878de-acdb-4b97-b9ff-9674c3f0881d","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Patch","Third Party Advisory","fix","web"]},{"url":"https://github.com/yetiforcecompany/yetiforcecrm/commit/6b5967198e43b6fbb3b2715b49c6cd5b12ce08c3","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-4121","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-j85f-xw9x-ffwp"},{"url":"https://github.com/yetiforcecompany/yetiforcecrm","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2021-4121","title":"Cross-site Scripting (XSS) - 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