CVE-2021-3111 EXPLOIT
4.8
MEDIUM · CVSS 3.1 · EPSS 3% (pctl 87)
Patch early
A public exploit exists.
Description
The Express Entries Dashboard in Concrete5 8.5.4 allows stored XSS via the name field of a new data object at an index.php/dashboard/express/entries/view/ URI.
Scoring
| CVSS | 4.8 (MEDIUM, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N |
| EPSS | 3.05% — more likely to be exploited than 87% of all CVEs |
| Weakness | CWE-79 |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2021-01-08 |
| Last modified | 2026-06-17 |
Affected (1)
| Vendor | Product |
|---|---|
| concretecms | concrete cms |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | Concrete5 8.5.4 - 'name' Stored XSS | 2021-03-29 |
References
- http://packetstormsecurity.com/files/161600/Concrete5-8.5.4-Cross-Site-Scripting.html
- http://packetstormsecurity.com/files/161997/Concrete5-8.5.4-Cross-Site-Scripting.html
- https://documentation.concrete5.org/developers/introduction/version-history
- https://documentation.concrete5.org/developers/introduction/version-history/855-release-notes
- https://github.com/Quadron-Research-Lab/CVE/blob/main/CVE-2021-3111.pdf
- http://packetstormsecurity.com/files/161600/Concrete5-8.5.4-Cross-Site-Scripting.html
- http://packetstormsecurity.com/files/161997/Concrete5-8.5.4-Cross-Site-Scripting.html
- https://documentation.concrete5.org/developers/introduction/version-history
- https://documentation.concrete5.org/developers/introduction/version-history/855-release-notes
- https://github.com/Quadron-Research-Lab/CVE/blob/main/CVE-2021-3111.pdf
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