CVE-2021-22950 json
Concrete CMS prior to 8.5.6 had a CSFR vulnerability allowing attachments to comments in the conversation section to be deleted.Credit for…
published 2021-09-23 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-10078
- cvss
- 6.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 38%
- public exploits
- 0
- none known
Summary
Concrete CMS prior to 8.5.6 had a CSFR vulnerability allowing attachments to comments in the conversation section to be deleted.Credit for discovery: "Solar Security Research Team"
Patch / fix
- concretecms concrete_cms 8.5.6
Exploit prediction
0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
Affected products
- n/a https://github.com/concrete5/concrete5
Classification
- Weakness
-
- CWE-352 Cross-Site Request Forgery
References
-
documentation.concretecms.org
/developers/introduction/version-history/856-release-notes
release-notes
-
hackerone.com
/reports/1102177
permissions-required
Sources
- CVE List CVE-2021-22950
- NVD CVE-2021-22950
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