What is CVE-2020-28734?

CVE-2020-28734 is a high-severity vulnerability in Plone, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 8.8/10. Published 2020-12-30.

How severe is CVE-2020-28734?

High severity. CVSS v3 base score is 8.8 out of 10.

XXE in Plone

CVE-2020-28734

Plone before 5.2.3 allows XXE attacks via a feature that is explicitly only available to the Manager role.

Vulnerability class: XXE (XML External Entity)

EPSS: 0.014 (70.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Plone
N/a — versions n/a

Weakness classification (CWE)

CWE-611 — Improper Restriction of XML External Entity Reference (XXE)

References

cve@mitre.org (x_refsource_MISC, Broken Link)
cve@mitre.org (Patch, Third Party Advisory, x_refsource_MISC)
cve@mitre.org (x_refsource_CONFIRM, Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2020-28734?: CVE-2020-28734 is a high-severity vulnerability in Plone, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 8.8/10. Published 2020-12-30.
How severe is CVE-2020-28734?: High severity. CVSS v3 base score is 8.8 out of 10.