D. Matscheko has reported a security issue in Apache Tomcat, which can be exploited by malicious people to bypass certain security restrictions.
If Tomcat is running behind a proxy with context restriction, an error within the handling of certain path delimiters in requests ('2F', '%5C', and '\') can be exploited to bypass the context restrictions and may allow access to non-proxied contexts.
The security issue is reported in versions 5.5.0 to 5.5.21, 5.0.0 to 188.8.131.52, and 6.0.0 to 6.0.9.
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