XSS in Opnsense
CVE-2021-42770
A Cross-site scripting (XSS) vulnerability was discovered in OPNsense before 21.7.4 via the LDAP attribute return in the authentication tester.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.014 (70.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 70.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.014 · change: +0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cert.orange.com (Third Party Advisory)
- opnsense.org/opnsense-21-7-4-released/ (Release Notes, Vendor Advisory)
- github.com/orangecertcc/security-research/security/advisories/GHSA-r32j-xgg3-w2… (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-42770?
- CVE-2021-42770 is a medium-severity vulnerability in Opnsense, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-11-08.
- How severe is CVE-2021-42770?
- Medium severity. CVSS v3 base score is 6.1 out of 10.
- Is CVE-2021-42770 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.