CVE-2021-4143
MEDIUMCVSS 6.1/10EPSS 0.89%
Last modified
CVE-2021-4143 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. Cross-site Scripting (XSS) - Generic in GitHub repository bigbluebutton/bigbluebutton prior to 2.4.0.. EPSS estimates a 0.89% chance of exploitation in the next 30 days.
Description
Cross-site Scripting (XSS) - Generic in GitHub repository bigbluebutton/bigbluebutton prior to 2.4.0.
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 |
|---|---|---|
| Bigbluebutton | Bigbluebutton | < 2.4.0 |
References
- https://github.com/bigbluebutton/bigbluebutton/commit/62040bdcb3c2f993ba72ab89f4db2015e18d1706Patch, Third Party Advisory
- https://huntr.dev/bounties/e67603e6-8497-4ab6-b93a-02c26407d443Exploit, Patch, Third Party Advisory
- https://github.com/bigbluebutton/bigbluebutton/commit/62040bdcb3c2f993ba72ab89f4db2015e18d1706Patch, Third Party Advisory
- https://huntr.dev/bounties/e67603e6-8497-4ab6-b93a-02c26407d443Exploit, Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-4143?
Cross-site Scripting (XSS) - Generic in GitHub repository bigbluebutton/bigbluebutton prior to 2.4.0.
How severe is CVE-2021-4143?
CVE-2021-4143 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.89% probability of exploitation in the next 30 days.
How do I fix CVE-2021-4143?
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.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-4143?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST