Medium severity · published May 21, 2021
CVE-2021-33507
Zope Products.CMFCore before 2.5.1 and Products.PluggableAuthService before 2.6.2, as used in Plone through 5.2.4 and other products, allow Reflected XSS
6.1
CVSS
0.8%
EPSS
No
On KEV
Description
Zope Products.CMFCore before 2.5.1 and Products.PluggableAuthService before 2.6.2, as used in Plone through 5.2.4 and other products, allow Reflected XSS.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 55% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PL
Plone · Plone
through 4.3.20; 5.0 through 5.2.4 · source: NVD
ZO
Zope · Zope
before 2.5.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-33507
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-33507
Mailing List
http://www.openwall.com/lists/oss-security/2021/05/22/1
Vendor Advisory
https://plone.org/security/hotfix/20210518/reflected-xss-in-various-spots
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