CVE-2021-42770
MEDIUMCVSS 6.1/10EPSS 1.33%
Last modified
CVE-2021-42770 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. A Cross-site scripting (XSS) vulnerability was discovered in OPNsense before 21.7.4 via the LDAP attribute return in the authentication tester.. EPSS estimates a 1.33% chance of exploitation in the next 30 days.
Description
A Cross-site scripting (XSS) vulnerability was discovered in OPNsense before 21.7.4 via the LDAP attribute return in the authentication tester.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Opnsense | Opnsense | <= 19.7.0 |
| Opnsense | Opnsense | >= 21.7.0, < 21.7.4 |
References
- https://cert.orange.comThird Party Advisory
- https://github.com/orangecertcc/security-research/security/advisories/GHSA-r32j-xgg3-w2rwExploit, Third Party Advisory
- https://opnsense.org/opnsense-21-7-4-released/Release Notes, Vendor Advisory
- https://cert.orange.comThird Party Advisory
- https://github.com/orangecertcc/security-research/security/advisories/GHSA-r32j-xgg3-w2rwExploit, Third Party Advisory
- https://opnsense.org/opnsense-21-7-4-released/Release Notes, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is 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.
How severe is CVE-2021-42770?
CVE-2021-42770 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 1.33% probability of exploitation in the next 30 days.
How do I fix CVE-2021-42770?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2021-42770?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST