CVE-2020-28735 json
SSRF attacks via tracebacks in Plone
published 5y ago modified 3mo ago also GHSA-x7wf-5mjc-6x76 , PYSEC-2020-247 , PYSEC-2026-2881 , PYSEC-2026-2884 , PYSEC-2026-2887 , PYSEC-2026-737 , EUVD-2020-0141
- cvss
- 8.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.5%
- EPSS 1.5% chance of exploitation in 30 days, percentile 73%
- public exploits
- 0
- none known
Summary
Plone before 5.2.3 allows SSRF attacks via the tracebacks feature (only available to the Manager role).
Patch / fix
- pypi plone 5.2.3
- pypi plone-app-event 3.2.10
- pypi plone-app-theming 4.1.6
- pypi plone-app-dexterity 2.6.8
- pypi plone-supermodel 1.6.3
- plone plone 5.2.3
Is CVE-2020-28735 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
1.45% chance of exploitation in the next 30 days, higher than 73% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.5 | AV:N/AC:L/Au:S/C:P/I:P/A:P |
| OSV | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| GitHub | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | plone | <5.2.3 |
5.2.3 |
| pypi | plone-app-event | <3.2.10 |
3.2.10 |
| pypi | plone-app-theming | <4.1.6 |
4.1.6 |
| pypi | plone-app-dexterity | <2.6.8 |
2.6.8 |
| pypi | plone-supermodel | <1.6.3 |
1.6.3 |
Classification
- Weakness
-
- CWE-918 Server-Side Request Forgery
References
-
github.com
/plone/Products.CMFPlone/issues/3209
web, patch, third-party-advisory, report
-
dist.plone.org
/release/5.2.3/RELEASE-NOTES.txt
web, release-notes, vendor-advisory
-
misakikata.com
/codes/plone/python-en.html
web, broken-link
-
nvd.nist.gov
/vuln/detail/CVE-2020-28735
advisory
-
github.com
/advisories/GHSA-x7wf-5mjc-6x76
advisory
-
github.com
/pypa/advisory-database/tree/main/vulns/plone/PYSEC-2020-247.yaml
web
-
pypi.org
/project/plone-app-event
package
-
pypi.org
/project/plone-supermodel
package
-
pypi.org
/project/plone-app-dexterity
package
-
pypi.org
/project/plone-app-theming
package
Sources
- CVE List CVE-2020-28735
- GitHub Advisory GHSA-x7wf-5mjc-6x76
- NVD CVE-2020-28735
- OSV PYSEC-2026-2884
- OSV PYSEC-2026-737
- OSV PYSEC-2020-247
- OSV PYSEC-2026-2881
- OSV PYSEC-2026-2887
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.