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CVE-2025-57816— Fides Webserver API Rate Limiting Vulnerability in Proxied Environments

Quick assessment

Affected
ethyca fides
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.

Fides是Ethyca开源的一个开源隐私工程平台，用于管理运行时环境中数据隐私请求的实现以及代码中隐私法规的执行。 Fides 2.69.1之前版本存在安全漏洞，该漏洞源于IP速率限制在CDN或代理环境下失效，可能导致拒绝服务攻击。

AI Predicted 4.3 Difficulty: Moderate EPSS 0.43% · P36

Possible ATT&CK Techniques 1 AI

T1499.002 · Service Exhaustion Flood
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I. Basic Information for CVE-2025-57816

Vulnerability Information
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Vulnerability Title
Fides Webserver API Rate Limiting Vulnerability in Proxied Environments
Source: CVE Program / CVE List V5
Vulnerability Description
Fides is an open-source privacy engineering platform. Prior to version 2.69.1, the Fides Webserver API's built-in IP-based rate limiting is ineffective in environments with CDNs, proxies or load balancers. The system incorrectly applies rate limits based on directly connected infrastructure IPs rather than client IPs, and stores counters in-memory rather than in a shared store. This allows attackers to bypass intended rate limits and potentially cause denial of service. This vulnerability only affects deployments relying on Fides's built-in rate limiting for protection. Deployments using external rate limiting solutions (WAFs, API gateways, etc.) are not affected. Version 2.69.1 fixes the issue. There are no application-level workarounds. However, rate limiting may instead be implemented externally at the infrastructure level using a WAF, API Gateway, or similar technology.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
交互频率的控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Fides 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Fides是Ethyca开源的一个开源隐私工程平台，用于管理运行时环境中数据隐私请求的实现以及代码中隐私法规的执行。 Fides 2.69.1之前版本存在安全漏洞，该漏洞源于IP速率限制在CDN或代理环境下失效，可能导致拒绝服务攻击。
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
ethyca fides < 2.69.1 -

II. Public POCs for CVE-2025-57816

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III. Intelligence Information for CVE-2025-57816

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Same Patch Batch · ethyca · 2025-09-08 · 4 CVEs total

CVE-2025-57815 Fides Lacks Brute-Force Protections on Authentication Endpoints
CVE-2025-57817 Fides Webserver API is Vulnerable to OAuth Client Privilege Escalation
CVE-2025-57766 Fides's Admin UI User Password Change Does Not Invalidate Current Session

IV. Related Vulnerabilities

Same product: fides
Same vendor: ethyca
Same weakness: CWE-799

V. Comments for CVE-2025-57816

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