{"id":"CVE-2021-28002","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-28002","generatedAt":"2026-10-27T20:20:42.343Z","title":"A persistent cross-site scripting vulnerability was discovered in the Excerpt parameter in Textpattern CMS 4.9.0 which allows remote attackers to execute arbitrary code via a crafted payload entered into the URL field.","description":"A persistent cross-site scripting vulnerability was discovered in the Excerpt parameter in Textpattern CMS 4.9.0 which allows remote attackers to execute arbitrary code via a crafted payload entered into the URL field. The vulnerability is triggered by users visiting the 'Articles' page.","published":"2021-08-19T14:39:32.000Z","lastModified":"2026-06-17T03:45:43.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":5.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"},"cwe":["CWE-79"],"affected":["textpattern/textpattern"],"epss":{"score":0.01073,"percentile":0.64703,"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 (1.07%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://www.exploit-db.com/exploits/49617","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"https://www.linkedin.com/in/tushar-vaidya-2111s5/","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://www.exploit-db.com/exploits/49617","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.linkedin.com/in/tushar-vaidya-2111s5/","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-28002","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."}