PT-2025-20297 · Envoy · Envoy

Bartosz Chwila + 1 · Published 2025-05-07 · Updated 2025-05-09 · CVE-2025-46821

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Name of the Vulnerable Software and Affected Versions Envoy versions prior to 1.34.1 Envoy versions prior to 1.33.3 Envoy versions prior to 1.32.6 Envoy versions prior to 1.31.8

Description The issue arises from Envoy's URI template matcher incorrectly excluding the * character from a set of valid characters in the URI path. This can lead to a bypass of Role-Based Access Control (RBAC) rules when configured using the uri template permissions.

Recommendations For versions prior to 1.34.1, update to version 1.34.1 or later. For versions prior to 1.33.3, update to version 1.33.3 or later. For versions prior to 1.32.6, update to version 1.32.6 or later. For versions prior to 1.31.8, update to version 1.31.8 or later. As a temporary workaround, configure additional RBAC permissions using url path with safe regex expression.

Exploit

Fix

Weakness Enumeration

CWE-186

Related Identifiers

BIT-ENVOY-2025-46821

CVE-2025-46821

GHSA-C7CM-838G-6G67

Affected Products

Envoy

References · 9

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/46xxx/CVE-2025-46821.json · Exploit
• https://github.com/envoyproxy/envoy/security/advisories/GHSA-c7cm-838g-6g67 · Vendor Advisory
• https://osv.dev/vulnerability/BIT-envoy-2025-46821 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-46821 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-46821 · Security Note
• https://twitter.com/CVEnew/status/1920246386781462617 · Twitter Post
• https://t.me/cvedetector/24764 · Telegram Post
• https://t.me/cvetracker/23314 · Telegram Post
• https://twitter.com/VulmonFeeds/status/1920293250834837941 · Twitter Post