CVE-2023-44763 json
ConcreteCMS vulnerable to Stored Cross-site Scripting
published 2023-10-10 3 y ago modified 2026-09-10 1 mo ago also GHSA-wrp2-6v6j-hfmg , EUVD-2023-2833
- cvss
- 5.4
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 53%
- public exploits
- 0
- none known
Summary
Concrete CMS v9.2.1 is affected by an Arbitrary File Upload vulnerability via a Thumbnail file upload, which allows Cross-Site Scripting (XSS). NOTE: the vendor's position is that a customer is supposed to know that "pdf" should be excluded from the allowed file types, even though pdf is one of the allowed file types in the default configuration.
Exploit prediction
0.71% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/sromanhu/ConcreteCMS-Arbitrary-file-upload-Thumbnail referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| GitHub | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | concrete5/concrete5 | <=9.2.1 |
no fix listed |
Classification
References
-
github.com
/sromanhu/ConcreteCMS-Arbitrary-file-upload-Thumbnail
web, exploit, third-party-advisory
-
concretecms.org
/about/project-news/security/security-advisory-2023-10-25-concrete-cms-rejects-cve-2023-44763
web
-
web.archive.org
/web/20231026034159/https://documentation.concretecms.org/user-guide/editors-reference/dashboard/system-and-ma
web
-
nvd.nist.gov
/vuln/detail/CVE-2023-44763
advisory
-
github.com
/concretecms/concretecms
package
Sources
- CVE List CVE-2023-44763
- GitHub Advisory GHSA-wrp2-6v6j-hfmg
- NVD CVE-2023-44763
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