Medium severity · published Apr 28, 2023
CVE-2023-28820
Concrete CMS (previously concrete5) before 9.1 is vulnerable to stored XSS in RSS Displayer via the href attribute because the link element input was not sanitized
5.4
CVSS
0.4%
EPSS
No
On KEV
Description
Concrete CMS (previously concrete5) before 9.1 is vulnerable to stored XSS in RSS Displayer via the href attribute because the link element input was not sanitized.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 33% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CC
Concrete Cms · Concretecms
before 9.1.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-28820
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-28820
Release Notes
https://github.com/concretecms/concretecms/releases
Vendor Advisory
https://www.concretecms.org/about/project-news/security/concrete-cms-security-advisory-2023-04-20
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