CVE-2025-52477

high

Description

Octo-STS is a GitHub App that acts like a Security Token Service (STS) for the GitHub API. Octo-STS versions before v0.5.3 are vulnerable to unauthenticated SSRF by abusing fields in OpenID Connect tokens. Malicious tokens were shown to trigger internal network requests which could reflect error logs with sensitive information. Upgrade to v0.5.3 to resolve this issue. This version includes patch sets to sanitize input and redact logging.

References

https://github.com/advisories/GHSA-h3qp-hwvr-9xcq

https://github.com/octo-sts/app/security/advisories/GHSA-h3qp-hwvr-9xcq

https://github.com/octo-sts/app/commit/b3976e39bd8c8c217c0670747d34a4499043da92

https://github.com/octo-sts/app/commit/0f177fde54f9318e33f0bba6abaea9463a7c3afd

https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-19216

Details

Source: Mitre, NVD

Published: 2025-06-26

Updated: 2026-04-15

Named Vulnerability: GO-2025-3779Named Vulnerability: GHSA-h3qp-hwvr-9xcq

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:N

Severity: High

CVSS v3

Base Score: 8.6

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

Severity: High

EPSS

EPSS: 0.00486