{"cve":"CVE-2021-33510","nvd":{"published":"2021-05-21T22:15:08.567","modified":"2026-06-17T03:54:42.173","status":"Modified","description":"Plone through 5.2.4 allows remote authenticated managers to conduct SSRF attacks via an event ical URL, to read one line of a file.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","score":4.3},"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-event-ical-url","http://www.openwall.com/lists/oss-security/2021/05/22/1","https://plone.org/security/hotfix/20210518/server-side-request-forgery-via-event-ical-url"],"products":["plone:plone"],"source":"nvd","synced_at":"2026-10-19T21:18:09.669877188+00:00"},"epss":{"cve":"CVE-2021-33510","score":0.00962,"percentile":0.61654,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-4mg4-wvmx-5332","url":"https://osv.dev/vulnerability/GHSA-4mg4-wvmx-5332","summary":"Server-Side Request Forgery in Plone","modified":"2024-10-18T22:00:56.804026Z","packages":[{"ecosystem":"PyPI","name":"plone","purl":"pkg:pypi/plone","ranges":["<=5.2.4"],"fixed":[]}]},{"id":"PYSEC-2021-82","url":"https://osv.dev/vulnerability/PYSEC-2021-82","summary":"","modified":"2023-11-08T04:06:05.076347Z","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."]}