What is CVE-2023-50164?

CVE-2023-50164 is a critical-severity vulnerability in Apache Struts, classified under Files or Directories Accessible to External Parties. CVSS score: 9.8/10. Published 2023-12-07.

How severe is CVE-2023-50164?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2023-50164 known to be exploited?

66 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Apache Struts

CVE-2023-50164

An attacker can manipulate file upload params to enable paths traversal and under some circumstances this can lead to uploading a malicious file which can be used to perform Remote Code Execution. Users are recommended to upgrade to versions Struts 2.5.33 or Struts 6.3.0.2 or greater to fix this issue.

Published 2023-12-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.808 (99.6th percentile), scored 2026-10-19.

High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.808 · newest: 0.808 · change: 0.000

Affected products

Apache Struts
Apache Software Foundation Struts — versions 2.0.0, 6.0.0

Weakness classification (CWE)

CWE-552 — Files or Directories Accessible to External Parties

Public proof-of-concept exploits

References

lists.apache.org/thread/yh09b3fkf6vz5d6jdgrlvmg60lfwtqhj (mailing-list, vendor-advisory, Patch, Mailing List)
www.openwall.com/lists/oss-security/2023/12/07/1 (Mailing List)
packetstormsecurity.com/files/176157/Struts-S2-066-File-Upload-Remote-Code-Exec… (VDB Entry, Third Party Advisory)
security.netapp.com/advisory/ntap-20231214-0010/ (VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2023-50164?: CVE-2023-50164 is a critical-severity vulnerability in Apache Struts, classified under Files or Directories Accessible to External Parties. CVSS score: 9.8/10. Published 2023-12-07.
How severe is CVE-2023-50164?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2023-50164 known to be exploited?: 66 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.