Exposure of Sensitive System Information to an Unauthorized Control Sphere Affecting io.projectreactor.netty:reactor-netty-http package, versions [0,1.2.8)[1.3.0-M1, 1.3.0-M5)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published17 Jul 2025
- disclosed15 Jul 2025
- creditMartin van Wingerden
Introduced: 15 Jul 2025
NewCVE-2025-22227 (opens in a new tab)How to fix?
Upgrade io.projectreactor.netty:reactor-netty-http to version 1.2.8, 1.3.0-M5 or higher.
Overview
Affected versions of this package are vulnerable to Exposure of Sensitive System Information to an Unauthorized Control Sphere via handling of chained redirects. An attacker can cause the Reactor Netty HTTP client to leak credentials such as session cookies by intercepting initial HTTP/1.1 requests containing and replaying them on new HTTP/2 connections.
Notes:
- For this to be exploited, the HTTP client must have been explicitly configured to follow redirects.
- For the commercial version of Spring, patches are also available for the 1.0.x and 1.1.x streams in 1.0.49 and 1.1.32 respectively.