XSS in Flatcore
CVE-2021-23838
An issue was discovered in flatCore before 2.0.0 build 139. A reflected XSS vulnerability was identified in the media_filter HTTP request body parameter for the acp interface. The affected parameter accepts malicious client-side script without proper input sanitization. For example, a malicious user can leverage this vulnerability to steal cookies from a victim user and perform a session-hijacking attack, which may then lead to unauthorized access to the site.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.010 (58.7th percentile) — read the EPSS interpretation.
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.
Affected products
- Flatcore
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (Product, Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (Exploit, VDB Entry, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-23838?
- CVE-2021-23838 is a medium-severity vulnerability in Flatcore, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2021-01-15.
- How severe is CVE-2021-23838?
- Medium severity. CVSS v3 base score is 4.8 out of 10.