{"cve":"CVE-2021-33511","nvd":{"published":"2021-05-21T22:15:08.597","modified":"2026-06-17T03:54:42.283","status":"Modified","description":"Plone though 5.2.4 allows SSRF via the lxml parser. This affects Diazo themes, Dexterity TTW schemas, and modeleditors in plone.app.theming, plone.app.dexterity, and plone.supermodel.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},"cwes":["CWE-918"],"references":["http://www.openwall.com/lists/oss-security/2021/05/22/1","https://plone.org/security/hotfix/20210518/server-side-request-forgery-via-lxml-parser","http://www.openwall.com/lists/oss-security/2021/05/22/1","https://plone.org/security/hotfix/20210518/server-side-request-forgery-via-lxml-parser"],"products":["plone:plone"],"source":"nvd","synced_at":"2026-10-19T21:18:09.669877188+00:00"},"epss":{"cve":"CVE-2021-33511","score":0.0116,"percentile":0.67136,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-gc9g-67cq-p7v4","url":"https://osv.dev/vulnerability/GHSA-gc9g-67cq-p7v4","summary":"Server-Side Request Forgery in Plone","modified":"2024-10-18T22:01:38.904412Z","packages":[{"ecosystem":"PyPI","name":"plone","purl":"pkg:pypi/plone","ranges":["<=5.2.4"],"fixed":[]}]},{"id":"PYSEC-2021-83","url":"https://osv.dev/vulnerability/PYSEC-2021-83","summary":"","modified":"2023-11-08T04:06:05.138482Z","packages":[{"ecosystem":"PyPI","name":"plone","purl":"pkg:pypi/plone","ranges":["<5.2.5"],"fixed":["5.2.5"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}