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CISA KEV · Known exploitedCritical

CVE-2017-5638

Apache Struts

The Jakarta Multipart parser in Apache Struts 2 2.3.x before 2.3.32 and 2.5.x before 2.5.10.1 has incorrect exception handling and error-message generation during file-upload attempts, which allows remote attackers to execute arbitrary commands via a crafted Content-Type, Content-Disposition, or Content-Length HTTP header, as exploited in the wild in March 2017 with a Content-Type header containing a #cmd= string.

CVSS
9.8
EPSS
100.0%
100.0% percentile
CISA KEV
Listed
Published
2017.03.11
PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV
Exploit probability100.0%
Technical severityCVSS 9.8

Vulnerability overview

The Jakarta Multipart parser in Apache Struts 2 2.3.x before 2.3.32 and 2.5.x before 2.5.10.1 has incorrect exception handling and error-message generation during file-upload attempts, which allows remote attackers to execute arbitrary commands via a crafted Content-Type, Content-Disposition, or Content-Length HTTP header, as exploited in the wild in March 2017 with a Content-Type header containing a #cmd= string.

Affected product and versions

Product
Apache Struts
Affected versions
2.3.x before 2.3.32, 2.5.x before 2.5.10.1, >= 2.2.3 < 2.3.32, >= 2.5.0 < 2.5.10.1, 7.7.1.6, 7.8.1.0, 9.1.0, 10.0.0, 10.1.0, 10.2.0, 10.5.0, 10.3.6.0.0, 12.1.3.0.0, 12.2.1.1.0, 12.2.1.2.0, < 6.6.5
Fixed versions
2.3.32, 2.5.10.1, 6.6.5

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
CISA required action

Apply updates per vendor instructions.

Due date: 2022.05.03
  1. 1
    Identify

    Confirm that Apache Struts and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-20, CWE-755
KEV added
2021.11.03
Ransomware use
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