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6.1
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.
CVE-2021-42770 · published 4 years ago
Summary
A Cross-site scripting (XSS) vulnerability was discovered in OPNsense before 21.7.4 via the LDAP attribute return in the authentication tester.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| opnsense | opnsense |
<= 19.7.0 >= 21.7.0, < 21.7.4 cpe:2.3:a:opnsense:opnsense:*:*:*:*:*:*:*:* |
Original advisory text
A Cross-site scripting (XSS) vulnerability was discovered in OPNsense before 21.7.4 via the LDAP attribute return in the authentication tester.
A Cross-site scripting (XSS) vulnerability was discovered in OPNsense before 21.7.4 via the LDAP attribute return in the authentication tester.
References
- https://cert.orange.com Third Party Advisory
- https://github.com/orangecertcc/security-research/security/advisories/GHSA-r32j-... Exploit Third Party Advisory
- https://opnsense.org/opnsense-21-7-4-released/ Release Notes Vendor Advisory
Internet-facing
60 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit (estimated)
- Gives an attacker partial control (estimated)
Type
CWE-79Cross-site Scripting (XSS)
Timeline
Published8 Nov 2021
Updated4 Nov 2026
First seen29 Sep 2026
Sources
CVE-2021-42770 · NVD
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