{"id":"CVE-2022-21169","aliases":["EUVD-2022-6830","GHSA-grjp-4jmr-mjcw"],"status":"published","title":"Prototype Pollution","description":"The package express-xss-sanitizer before 1.1.3 are vulnerable to Prototype Pollution via the allowedTags attribute, allowing the attacker to bypass xss sanitization.","severity":{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00954,"percentile":0.61614,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1321"],"published":"2022-09-26T05:05:11Z","modified":"2026-10-28T02:30:32Z","fixes":[{"ecosystem":"npm","package":"express-xss-sanitizer","fixed_in":["1.1.3"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"express-xss-sanitizer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.3"}]}]},{"source":"osv","ecosystem":"npm","package":"express-xss-sanitizer","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.1.3"}]}]}],"products":[{"vendor":"ahmedadelfahim","product":"express-xss-sanitizer"},{"vendor":"express_xss_sanitizer_project","product":"express_xss_sanitizer"}],"references":[{"url":"https://security.snyk.io/vuln/SNYK-JS-EXPRESSXSSSANITIZER-3027443","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","web"]},{"url":"https://github.com/AhmedAdelFahim/express-xss-sanitizer/issues/4","tags":["x_refsource_MISC","x_transferred","Exploit","Issue Tracking","Third Party Advisory","report","web"]},{"url":"https://runkit.com/embed/w306l6zfm7tu","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","URL Repurposed","web"]},{"url":"https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/3bf8aaaf4dbb1c209dcb8d87a82711a54c1ab39a","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-21169","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-grjp-4jmr-mjcw"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/21xxx/CVE-2022-21169.json","tags":["advisory"]},{"url":"https://github.com/AhmedAdelFahim/express-xss-sanitizer","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2022-21169","title":"Prototype Pollution","description":"The package express-xss-sanitizer before 1.1.3 are vulnerable to Prototype Pollution via the allowedTags attribute, allowing the attacker to bypass xss sanitization.","status":"published","published":"2022-09-26T05:05:11.2Z","modified":"2025-05-21T20:29:25.084Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P","level":"high","assessor":"cna"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T14:34:29.057251Z"}],"euvd":[{"id":"EUVD-2022-6830","description":"The package express-xss-sanitizer before 1.1.3 are vulnerable to Prototype Pollution via the allowedTags attribute, allowing the attacker to bypass xss sanitization.","status":"published","published":"2022-09-26T05:05:11Z","modified":"2025-05-21T20:29:25Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P","level":"high"}],"updated_at":"2026-11-02T20:32:41.053396Z"}],"ghsa":[{"id":"GHSA-grjp-4jmr-mjcw","title":"express-xss-sanitizer vulnerable to Prototype Pollution via allowedTags attribute","description":"The package express-xss-sanitizer before 1.1.3 is vulnerable to Prototype Pollution via the `allowedTags` attribute, allowing the attacker to bypass xss sanitization.","status":"published","published":"2022-09-27T00:00:22Z","modified":"2023-01-29T05:05:14Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T14:36:25.835323Z"}],"nvd":[{"id":"CVE-2022-21169","description":"The package express-xss-sanitizer before 1.1.3 are vulnerable to Prototype Pollution via the allowedTags attribute, allowing the attacker to bypass xss sanitization.","status":"published","published":"2022-09-26T05:15:10.133Z","modified":"2026-06-17T04:25:40.183Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"high","assessor":"secondary"},{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T14:07:28.501364Z"}],"osv":[{"id":"CVE-2022-21169","title":"Prototype Pollution","description":"The package express-xss-sanitizer before 1.1.3 are vulnerable to Prototype Pollution via the allowedTags attribute, allowing the attacker to bypass xss sanitization.","status":"published","published":"2022-09-26T05:05:11.2Z","modified":"2026-10-28T02:30:32.339807192Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P","level":"high"}],"updated_at":"2026-11-02T15:44:23.655778Z"},{"id":"GHSA-grjp-4jmr-mjcw","title":"express-xss-sanitizer vulnerable to Prototype Pollution via allowedTags attribute","description":"The package express-xss-sanitizer before 1.1.3 is vulnerable to Prototype Pollution via the `allowedTags` attribute, allowing the attacker to bypass xss sanitization.","status":"published","published":"2022-09-27T00:00:22Z","modified":"2023-11-08T04:08:04.407342Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T15:46:48.191583Z"}]}}