CVE-2025-25294 - CVE House

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Status published Medium CVE-2025-25294

Envoy Gateway Log Injection Vulnerability

5.3 CVSS

Vulnerability Description

Envoy Gateway is an open source project for managing Envoy Proxy as a standalone or Kubernetes-based application gateway. In all Envoy Gateway versions prior to 1.2.7 and 1.3.1 a default Envoy Proxy access log configuration is used. This format is vulnerable to log injection attacks. If the attacker uses a specially crafted user-agent which performs json injection, then he could add and overwrite fields to the access log. This vulnerability is fixed in 1.3.1 and 1.2.7. One can overwrite the old text based default format with JSON formatter by modifying the "EnvoyProxy.spec.telemetry.accessLog" setting.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

More from envoyproxy

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Envoy forwards early CONNECT data in TCP proxy mode

Envoy crashes when JWT authentication is configured with the remote JWKS fetching

Envoy Lua filter use-after-free when oversized rewritten response body causes crash

Envoy allows large requests and responses to cause TCP connection pool crash

Affected Vendor

envoyproxy

View all reports →

Affected Software

gateway

Vulnerable Versions:

>= 1.3.0-rc.1, < 1.3.1, < 1.2.7

Timeline

Official Publish: March 6th, 2025

Last Modified: March 6th, 2025

Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Weaknesses (CWE)

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.