CVE-2021-33511
unknown
CVSS v3
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CVSS v4 NEW
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VIR risk
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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.
Predictions
Exploit likelihood
30%
Patch ETA
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Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
References
- https://nvd.nist.gov/vuln/detail/CVE-2021-33511
- https://github.com/advisories/GHSA-gc9g-67cq-p7v4
- https://github.com/plone/Plone
- https://github.com/pypa/advisory-database/tree/main/vulns/plone/PYSEC-2021-83.yaml
- https://plone.org/security/hotfix/20210518/server-side-request-forgery-via-lxml-parser
- http://www.openwall.com/lists/oss-security/2021/05/22/1
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.