CVE-2020-11476 json
Unrestricted Uploads in Concrete5
published 2020-07-28 6 y ago modified 2026-06-17 4 mo ago also GHSA-hf9p-9r39-r2h3 , EUVD-2021-2356
- cvss
- 7.2
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.9%
- EPSS 2.9% chance of exploitation in 30 days, percentile 87%
- public exploits
- 0
- none known
Summary
Concrete5 before 8.5.3 allows Unrestricted Upload of File with Dangerous Type such as a .phar file.
Patch / fix
- packagist concrete5/concrete5 8.5.3
- concretecms concrete_cms 8.5.3
Exploit prediction
2.94% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- herolab.usd.de https://herolab.usd.de/security-advisories/usd-2020-0041/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.2 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 9.0 | AV:N/AC:L/Au:S/C:C/I:C/A:C |
| GitHub | 3.1 | 7.2 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | concrete5/concrete5 | <8.5.3 |
8.5.3 |
Classification
- Weakness
-
- CWE-434 Unrestricted Upload of File with Dangerous Type
References
-
github.com
/concrete5/concrete5/pull/8713
web, patch, third-party-advisory
-
github.com
/concretecms/concretecms/commit/d296f4ba4f6ad94b199c21c1b16f0d185adab343
web
-
herolab.usd.de
/security-advisories/usd-2020-0041/
exploit, third-party-advisory
-
herolab.usd.de
/security-advisories/
third-party-advisory
-
github.com
/concrete5/concrete5/releases/tag/8.5.3
web, release-notes, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2020-11476
advisory
-
github.com
/concrete5/concrete5
package
-
herolab.usd.de
/security-advisories/usd-2020-0041
web
Sources
- CVE List CVE-2020-11476
- GitHub Advisory GHSA-hf9p-9r39-r2h3
- NVD CVE-2020-11476
Fencer Vulns 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.