What’s Vulnerable › Vulnerabilities

CVE-2021-28681

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-03-18 · updated 2026-06-17
• Weakness: CWE-863

Description

Pion WebRTC before 3.0.15 didn't properly tear down the DTLS Connection when certificate verification failed. The PeerConnectionState was set to failed, but a user could ignore that and continue to use the PeerConnection. )A WebRTC implementation shouldn't allow the user to continue if verification has failed.)

Affected products

• Webrtc Project Webrtc: before 3.0.15 — fixed in 3.0.15

How to fix

Upgrade to a fixed version: Webrtc Project Webrtc 3.0.15. Check the vendor advisory for mitigations.

References

• https://github.com/pion/webrtc/issues/1708
• https://github.com/pion/webrtc/security/advisories/GHSA-74xm-qj29-cq8p
• https://github.com/pion/webrtc/issues/1708
• https://github.com/pion/webrtc/security/advisories/GHSA-74xm-qj29-cq8p

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