Unrestricted Upload of File with Dangerous Type Apache Tomcat

Exploitation

Confirmed: listed in the CISA Known Exploited Vulnerabilities catalog.

CVSS

8.1 · CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H

EPSS

• CVE-2017-12617: 99.97% estimated exploitation activity in the next 30 days; percentile 99.98 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

When running Apache Tomcat versions 9.0.0.M1 to 9.0.0, 8.5.0 to 8.5.22, 8.0.0.RC1 to 8.0.46 and 7.0.0 to 7.0.81 with HTTP PUTs enabled (e.g. via setting the readonly initialisation parameter of the Default servlet to false) it was possible to upload a JSP file to the server via a specially crafted request. This JSP could then be requested and any code it contained would be executed by the server.

Published by the source

14 May 2022, 01:07 UTC

Last modified by the source

22 Oct 2025, 17:30 UTC

Source last checked

26 Oct 2026, 16:40 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-xjgh-84hx-56c5

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# Patch Next advisory brief: CVE-2017-12617

Advisory: Unrestricted Upload of File with Dangerous Type Apache Tomcat
IDs: CVE-2017-12617, GHSA-xjgh-84hx-56c5
Record: https://patchnext.com/advisories/cve-2017-12617 (revision 1, source checked 26 Oct 2026, 16:40 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.1)
Exploitation: confirmed: listed in the CISA Known Exploited Vulnerabilities catalog.
Vendor response: Vendor fix available; fixed versions by package: org.apache.tomcat:tomcat-catalina 9.0.1, 8.5.23, 8.0.47, 7.0.82; org.apache.tomcat.embed:tomcat-embed-core 9.0.1, 8.5.23, 8.0.47, 7.0.82. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven org.apache.tomcat:tomcat-catalina: affected >= 9.0.0.M1, <= 9.0.0M27; >= 8.5.0, <= 8.5.22; >= 8.0.0-RC1, <= 8.0.46; >= 7.0.0, <= 7.0.81; fixed in 8.0.47, 9.0.1, 8.5.23, 7.0.82
- Maven org.apache.tomcat.embed:tomcat-embed-core: affected >= 9.0.0.M1, <= 9.0.0M27; >= 8.5.0, <= 8.5.22; >= 8.0.0-RC1, <= 8.0.46; >= 7.0.0, <= 7.0.81; fixed in 8.0.47, 9.0.1, 8.5.23, 7.0.82

## Suggested inspection (read-only)
- Maven org.apache.tomcat:tomcat-catalina: check the installed version with your package manager.
- Maven org.apache.tomcat.embed:tomcat-embed-core: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on org.apache.tomcat:tomcat-catalina, org.apache.tomcat.embed:tomcat-embed-core.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-xjgh-84hx-56c5 (GitHub-reviewed advisory GHSA-xjgh-84hx-56c5 lists affected ranges: Maven org.apache.tomcat:tomcat-catalina >=9.0.0.M1 =8.5.0 =8.0.0-RC1 =7.0.0 =9.0.0.M1 =8.5.0 =8.0.0-RC1 =7.0.0 <=7.0.81)
- Verified: https://www.cisa.gov/known-exploited-vulnerabilities-catalog (CISA added CVE-2017-12617 to the Known Exploited Vulnerabilities catalog on 2022-03-25.)

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