XSS in Plone

CVE-2021-29002

A stored cross-site scripting (XSS) vulnerability in Plone CMS 5.2.3 exists in site-controlpanel via the "form.widgets.site_title" parameter.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.008 (51.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Plone — versions 5.2.3
N/a — versions n/a

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

miguelc49/CVE-2021-29002-1

References

cve@mitre.org (Exploit, VDB Entry, Third Party Advisory, x_refsource_MISC)
cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC, Issue Tracking)

Frequently asked questions

What is CVE-2021-29002?: CVE-2021-29002 is a medium-severity vulnerability in Plone, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-03-24.
How severe is CVE-2021-29002?: Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2021-29002 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.