CVE-2021-33511

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.
SSRF
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
mitreCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 50%
VendorProductVersion
ploneplone
𝑥
≤ 5.2.4
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
http://www.openwall.com/lists/oss-security/2021/05/22/1
https://plone.org/security/hotfix/20210518/server-side-request-forgery-via-lxml-parser
http://www.openwall.com/lists/oss-security/2021/05/22/1
https://plone.org/security/hotfix/20210518/server-side-request-forgery-via-lxml-parser