CVE-2023-34478 — Apache Shiro, before 1

Apache Shiro, before 1.12.0 or 2.0.0-alpha-3, may be susceptible to a path traversal attack that results in an authentication bypass when used together with APIs or other web frameworks that route requests based on non-normalized requests.

01What is this vulnerability?

Apache Shiro, before 1.12.0 or 2.0.0-alpha-3, may be susceptible to a path traversal attack that results in an authentication bypass when used together with APIs or other web frameworks that route requests based on non-normalized requests.

02Affected products

Vendor	Product	Versions
Apache Software Foundation	Apache Shiro	0, 0

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-07-24T18:24:45.619Z
• Last modified: 2025-02-13T16:55:37.269Z

09References

• lists.apache.org — https://lists.apache.org/thread/mbv26onkgw9o35rldh7vmq11wpv2t2qk
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/07/24/4
• security.netapp.com — https://security.netapp.com/advisory/ntap-20230915-0005/