XSS in Freeter
CVE-2021-47835
Freeter 1.2.1 contains a persistent cross-site scripting vulnerability that allows attackers to store malicious payloads in custom widget titles and files. Attackers can craft malicious files with embedded scripts that execute when victims interact with the application, potentially enabling remote code execution.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.005 (37.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.000
Affected products
- Freeter — versions 1.2.1
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/49833 (exploit)
- freeter.io/ (product)
- imgur.com/a/iBuKWm4 (exploit)
- www.vulncheck.com/advisories/freeter-persistent-cross-site-scripting (third-party-advisory)
Frequently asked questions
- What is CVE-2021-47835?
- CVE-2021-47835 is a high-severity vulnerability in Freeter, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2026-01-16.
- How severe is CVE-2021-47835?
- High severity. CVSS v3 base score is 7.2 out of 10.