CVE-2021-31920: Incorrect Authorization

May 27, 2021 (updated July 31, 2023)

Istio has a remotely exploitable vulnerability where an HTTP request path with multiple slashes or escaped slash characters (%2F or %5C) could potentially bypass an Istio authorization policy when path based authorization rules are used.

References

istio.io/latest/news/security/istio-security-2021-005/
nvd.nist.gov/vuln/detail/CVE-2021-31920

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