{"id":"CVE-2021-35210","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-35210","generatedAt":"2026-10-27T21:08:26.590Z","title":"Contao 4.5.x through 4.9.x before 4.9.16, and 4.10.x through 4.11.x before 4.11.5, allows XSS.","description":"Contao 4.5.x through 4.9.x before 4.9.16, and 4.10.x through 4.11.x before 4.11.5, allows XSS. It is possible to inject code into the tl_log table that will be executed in the browser when the system log is called in the back end.","published":"2021-06-23T11:15:08.000Z","lastModified":"2026-06-17T03:57:18.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},"cwe":["CWE-79"],"affected":["contao/contao"],"epss":{"score":0.0074,"percentile":0.54313,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.74%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://contao.org/en/security-advisories/cross-site-scripting-in-the-system-log-2021.html","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/contao/contao/security/advisories/GHSA-h58v-c6rf-g9f7","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://contao.org/en/security-advisories/cross-site-scripting-in-the-system-log-2021.html","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/contao/contao/security/advisories/GHSA-h58v-c6rf-g9f7","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-35210","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}