High severity · published May 21, 2021
CVE-2021-33511
Plone though 5.2.4 allows SSRF via the lxml parser
7.5
CVSS
1.2%
EPSS
No
On KEV
Description
Plone though 5.2.4 allows SSRF via the lxml parser. This affects Diazo themes, Dexterity TTW schemas, and modeleditors in plone.app.theming, plone.app.dexterity, and plone.supermodel.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.2% · higher than 67% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PL
Plone · Plone
through 5.2.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-33511
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-33511
Mailing List
http://www.openwall.com/lists/oss-security/2021/05/22/1
Vendor Advisory
https://plone.org/security/hotfix/20210518/server-side-request-forgery-via-lxml-parser
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