{"id":"CVE-2021-32819","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-32819","generatedAt":"2026-10-28T00:33:21.238Z","title":"By overwriting internal configuration options remote code execution may be triggered in downstream applications.","description":"Squirrelly is a template engine implemented in JavaScript that works out of the box with ExpressJS. Squirrelly mixes pure template data with engine configuration options through the Express render API. By overwriting internal configuration options remote code execution may be triggered in downstream applications. This issue is fixed in version 9.0.0. For complete details refer to the referenced GHSL-2021-023.","published":"2021-05-14T19:15:08.000Z","lastModified":"2026-06-17T03:53:42.000Z","status":"Modified","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},"cwe":["CWE-200"],"affected":["squirrelly/squirrelly"],"epss":{"score":0.58286,"percentile":0.99089,"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":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 58.3%, higher than 99% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"https://github.com/squirrellyjs/squirrelly/commit/c12418a026f73df645ba927fd29358efe02fed1e","source":"security-advisories@github.com"},{"url":"https://github.com/squirrellyjs/squirrelly/commit/dca7a1e7ee91d8a6ffffb655f3f15647486db9da","source":"security-advisories@github.com"},{"url":"https://github.com/squirrellyjs/squirrelly/pull/254","source":"security-advisories@github.com"},{"url":"https://securitylab.github.com/advisories/GHSL-2021-023-squirrelly/","tags":["Exploit","Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://github.com/squirrellyjs/squirrelly/commit/c12418a026f73df645ba927fd29358efe02fed1e","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/squirrellyjs/squirrelly/commit/dca7a1e7ee91d8a6ffffb655f3f15647486db9da","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/squirrellyjs/squirrelly/pull/254","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://securitylab.github.com/advisories/GHSL-2021-023-squirrelly/","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-32819","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."}