Ethyca Fides up to 2.69.0 Webserver API improper control of interaction frequency

Summaryinfo

A vulnerability classified as problematic was found in Ethyca Fides up to 2.69.0. The affected element is an unknown function of the component Webserver API. Such manipulation leads to improper control of interaction frequency. This vulnerability is referenced as CVE-2025-57816. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Ethyca Fides up to 2.69.0. Affected by this issue is an unknown function of the component Webserver API. The manipulation with an unknown input leads to a improper control of interaction frequency vulnerability. Using CWE to declare the problem leads to CWE-799. The product does not properly limit the number or frequency of interactions that it has with an actor, such as the number of incoming requests. Impacted is availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2025-57816 since 08/20/2025. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

Upgrading to version 2.69.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-29103). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• Ethyca

Name

• Fides

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11
• 2.12
• 2.13
• 2.14
• 2.15
• 2.16
• 2.17
• 2.18
• 2.19
• 2.20
• 2.21
• 2.22
• 2.23
• 2.24
• 2.25
• 2.26
• 2.27
• 2.28
• 2.29
• 2.30
• 2.31
• 2.32
• 2.33
• 2.34
• 2.35
• 2.36
• 2.37
• 2.38
• 2.39
• 2.40
• 2.41
• 2.42
• 2.43
• 2.44
• 2.45
• 2.46
• 2.47
• 2.48
• 2.49
• 2.50
• 2.51
• 2.52
• 2.53
• 2.54
• 2.55
• 2.56
• 2.57
• 2.58
• 2.59
• 2.60
• 2.61
• 2.62
• 2.63
• 2.64
• 2.65
• 2.66
• 2.67
• 2.68
• 2.69.0

Website

• Product: https://github.com/ethyca/fides/

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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