What’s Vulnerable › Vulnerabilities

CVE-2020-5233: Open Redirect in OAuth2 Proxy

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-01-30 · updated 2026-06-17
• Weakness: CWE-601

Description

OAuth2 Proxy before 5.0 has an open redirect vulnerability. Authentication tokens could be silently harvested by an attacker. This has been patched in version 5.0.

Affected products

• oauth2-proxy: before 5.0.0 — fixed in 5.0.0

How to fix

Upgrade to a fixed version: oauth2-proxy 5.0.0. Check the vendor advisory for mitigations.

References

• https://github.com/pusher/oauth2_proxy/commit/a316f8a06f3c0ca2b5fc5fa18a91781b313607b2
• https://github.com/pusher/oauth2_proxy/releases/tag/v5.0.0
• https://github.com/pusher/oauth2_proxy/security/advisories/GHSA-qqxw-m5fj-f7gv
• https://github.com/pusher/oauth2_proxy/commit/a316f8a06f3c0ca2b5fc5fa18a91781b313607b2
• https://github.com/pusher/oauth2_proxy/releases/tag/v5.0.0
• https://github.com/pusher/oauth2_proxy/security/advisories/GHSA-qqxw-m5fj-f7gv

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