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Vulnerability record · CVE-2020-28735 · published 30 December 2020

CVE-2020-28735: Plone server-side request forgery (ssrf) vulnerability

Plone · Plone

Plone before 5.2.3 allows SSRF attacks via the tracebacks feature (only available to the Manager role).

8.8 CVSS 3.1 High EPSS 1.5% · top 27.6% CWE-918 · Server-side request forgery (SSRF)
8.8CVSS 3.1 base score, v2 6.5
1.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

Plone before 5.2.3 allows SSRF attacks via the tracebacks feature (only available to the Manager role).

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://dist.plone.org/release/5.2.3/RELEASE-NOTES.txt Release NotesVendor Advisory
https://github.com/plone/Products.CMFPlone/issues/3209 PatchThird Party Advisory
https://www.misakikata.com/codes/plone/python-en.html Broken Link
https://dist.plone.org/release/5.2.3/RELEASE-NOTES.txt Release NotesVendor Advisory
https://github.com/plone/Products.CMFPlone/issues/3209 PatchThird Party Advisory
https://www.misakikata.com/codes/plone/python-en.html Broken Link

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-28735), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.