{"id":"CVE-2021-38339","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-38339","generatedAt":"2026-10-27T19:05:37.858Z","title":"The Simple Matted Thumbnails WordPress plugin is vulnerable to Reflected Cross-Site Scripting due to a reflected $_SERVER[\"PHP_SELF\"] value in the ~/simple-matted-thumbnail.php file which allows attackers to inject arbitrary web scripts, in versions up…","description":"The Simple Matted Thumbnails WordPress plugin is vulnerable to Reflected Cross-Site Scripting due to a reflected $_SERVER[\"PHP_SELF\"] value in the ~/simple-matted-thumbnail.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 1.01.","published":"2021-09-10T14:15:10.000Z","lastModified":"2026-06-17T04:01:54.000Z","status":"Modified","sourceIdentifier":"security@wordfence.com","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":["devondev/simple matted thumbnails"],"epss":{"score":0.00895,"percentile":0.5926,"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 (0.90%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://plugins.trac.wordpress.org/browser/simple-matted-thumbnails/tags/1.01/simple-matted-thumbnail.php#L122","tags":["Exploit","Third Party Advisory"],"source":"security@wordfence.com"},{"url":"https://www.wordfence.com/vulnerability-advisories/#CVE-2021-38339","tags":["Third Party Advisory"],"source":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/simple-matted-thumbnails/tags/1.01/simple-matted-thumbnail.php#L122","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.wordfence.com/vulnerability-advisories/#CVE-2021-38339","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-38339","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."}