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CVE-2025-25294— Envoy Gateway Log Injection Vulnerability

Quick assessment

Affected
envoyproxy gateway
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Envoy Gateway是Envoy Proxy开源的一个将 Envoy 代理作为独立或基于 Kubernetes 的应用程序网关。 Envoy Gateway 1.2.7和1.3.1之前版本存在安全漏洞，该漏洞源于默认的Envoy Proxy访问日志配置容易受到日志注入攻击。

CVSS 5.3 · Medium EPSS 0.29% · P20

Possible ATT&CK Techniques 1 AI

T1565.003 · Runtime Data Manipulation
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I. Basic Information for CVE-2025-25294

Vulnerability Information
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Vulnerability Title
Envoy Gateway Log Injection Vulnerability
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
日志输出的转义处理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Envoy Gateway 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Envoy Gateway是Envoy Proxy开源的一个将 Envoy 代理作为独立或基于 Kubernetes 的应用程序网关。 Envoy Gateway 1.2.7和1.3.1之前版本存在安全漏洞，该漏洞源于默认的Envoy Proxy访问日志配置容易受到日志注入攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
envoyproxy gateway >= 1.3.0-rc.1, < 1.3.1 -

II. Public POCs for CVE-2025-25294

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III. Intelligence Information for CVE-2025-25294

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Patches & Fixes for CVE-2025-25294 (1)

Vendor Advisories for CVE-2025-25294 (1)

IV. Related Vulnerabilities

Same product: gateway
Same vendor: envoyproxy
Same weakness: CWE-117

V. Comments for CVE-2025-25294

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