XSS in Concretecms Concrete Cms
CVE-2021-3111
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.030 (86.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 86.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.030 · newest: 0.030 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- documentation.concrete5.org/developers/introduction/version-history (Release Notes, Vendor Advisory)
- github.com/Quadron-Research-Lab/CVE/blob/main/CVE-2021-3111.pdf (Exploit, Third Party Advisory)
- packetstormsecurity.com/files/161600/Concrete5-8.5.4-Cross-Site-Scripting.html (Exploit, VDB Entry, Third Party Advisory)
- documentation.concrete5.org/developers/introduction/version-history/855-release… (Release Notes, Vendor Advisory)
- packetstormsecurity.com/files/161997/Concrete5-8.5.4-Cross-Site-Scripting.html (VDB Entry, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-3111?
- CVE-2021-3111 is a medium-severity vulnerability in Concretecms Concrete Cms, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2021-01-08.
- How severe is CVE-2021-3111?
- Medium severity. CVSS v3 base score is 4.8 out of 10.
- Is CVE-2021-3111 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.