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Vulnerability record · CVE-2020-5233 · published 30 January 2020

CVE-2020-5233: Oauth2 proxy project oauth2 proxy open redirect vulnerability

OOauth2 Proxy Project · Oauth2 Proxy

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.

6.1 CVSS 3.1 Medium EPSS 1.3% · top 30.6% CWE-601 · Open redirect
6.1CVSS 3.1 base score, v2 5.8
1.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/pusher/oauth2_proxy/commit/a316f8a06f3c0ca2b5fc5fa18a91781b313607b2 PatchThird Party Advisory
https://github.com/pusher/oauth2_proxy/releases/tag/v5.0.0 Release NotesThird Party Advisory
https://github.com/pusher/oauth2_proxy/security/advisories/GHSA-qqxw-m5fj-f7gv ExploitPatchThird Party Advisory
https://github.com/pusher/oauth2_proxy/commit/a316f8a06f3c0ca2b5fc5fa18a91781b313607b2 PatchThird Party Advisory
https://github.com/pusher/oauth2_proxy/releases/tag/v5.0.0 Release NotesThird Party Advisory
https://github.com/pusher/oauth2_proxy/security/advisories/GHSA-qqxw-m5fj-f7gv ExploitPatchThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-5233), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.