# CVE-2025-55754: Apache Tomcat console manipulation via ANSI escape sequences in logs

Source: https://junglewise.ai/threats/cve-2025-55754-apache-tomcat-console-manipulation-via-ansi-escape-sequences-in  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-10-27. Updated: 2026-05-13  
License: CC BY 4.0 with a link back

CVE-2025-55754 · Severity: critical · CVSS 9.6 · Published 2025-10-27

Apache Tomcat is a widely used web server for hosting Java applications. A vulnerability exists where an attacker can send a specially crafted web request that causes malicious commands to be hidden within the server's log files. If an administrator views these logs in a terminal that supports special formatting codes (ANSI sequences), the attacker could potentially manipulate the administrator's console or clipboard to trick them into executing unauthorized commands.

Technologies: [Apache Tomcat](https://junglewise.ai/threats/technologies/tomcat), [org.apache.tomcat:tomcat (Maven)](https://junglewise.ai/threats/technologies/org-apache-tomcat-tomcat), [org.apache.tomcat:tomcat-catalina (Maven)](https://junglewise.ai/threats/technologies/org-apache-tomcat-tomcat-catalina), [org.apache.tomcat.embed:tomcat-embed-core (Maven)](https://junglewise.ai/threats/technologies/org-apache-tomcat-embed-tomcat-embed-core). Vendors: [Apache](https://junglewise.ai/threats/vendors/apache), [Maven](https://junglewise.ai/threats/vendors/maven).

## Quick answers

**Is CVE-2025-55754 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-55754 being exploited in the wild.

**How severe is CVE-2025-55754?** Critical severity, with a CVSS score of 9.6, published 27 October 2025.

**Which products and versions are affected?** Apache Tomcat 11.0.0-M1 through 11.0.10, 10.1.0-M1 through 10.1.44, 9.0.40 through 9.0.108, 8.5.60 through 8.5.100; org.apache.tomcat:tomcat (Maven) ECOSYSTEM:introduced=11.0.0-M1,fixed=11.0.11; org.apache.tomcat:tomcat-catalina (Maven) ECOSYSTEM:introduced=11.0.0-M1,fixed=11.0.11; org.apache.tomcat.embed:tomcat-embed-core (Maven) ECOSYSTEM:introduced=11.0.0-M1,fixed=11.0.11.

**Is there a fix for CVE-2025-55754?** Yes. org.apache.tomcat:tomcat (Maven): upgrade to 11.0.11 or later; org.apache.tomcat:tomcat-catalina (Maven): upgrade to 11.0.11 or later; org.apache.tomcat.embed:tomcat-embed-core (Maven): upgrade to 11.0.11 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2025-55754 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2025-55754?** Check whether you run Apache Tomcat, org.apache.tomcat:tomcat (Maven), org.apache.tomcat:tomcat-catalina (Maven) or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- org.apache.tomcat:tomcat (Maven): upgrade to 11.0.11 or later

  ```sh
  # set org.apache.tomcat:tomcat to 11.0.11 in your pom.xml or build.gradle
  ```

- org.apache.tomcat:tomcat-catalina (Maven): upgrade to 11.0.11 or later

  ```sh
  # set org.apache.tomcat:tomcat-catalina to 11.0.11 in your pom.xml or build.gradle
  ```

- org.apache.tomcat.embed:tomcat-embed-core (Maven): upgrade to 11.0.11 or later

  ```sh
  # set org.apache.tomcat.embed:tomcat-embed-core to 11.0.11 in your pom.xml or build.gradle
  ```


## Technical details

Apache Tomcat fails to properly neutralize ANSI escape sequences before writing them to log files. An attacker can trigger this by sending a specially crafted URL containing these sequences, which Tomcat then logs. If the server is running in a console (primarily on Windows) that interprets ANSI sequences, an administrator viewing the logs could be subjected to terminal manipulation or clipboard hijacking. This is classified as CWE-150 (Improper Neutralization of Escape, Meta, or Control Sequences). While the primary risk is identified for Windows environments, other operating systems using ANSI-compliant terminals may also be affected. Patches are available in versions 11.0.11, 10.1.45, and 9.0.109.

## Affected products

- Apache Tomcat 11.0.0-M1 through 11.0.10, 10.1.0-M1 through 10.1.44, 9.0.40 through 9.0.108, 8.5.60 through 8.5.100

## Identifiers

- CVE-2025-55754
- GHSA-vfww-5hm6-hx2j

## Timeline

- 2025-10-27: disclosed
- 2025-10-27: advisory

## References

- [https://api.github.com/users/aruneko](https://api.github.com/users/aruneko)
- [https://github.com/aruneko](https://github.com/aruneko)
- [https://api.github.com/users/aruneko/gists%7B/gist_id%7D](https://api.github.com/users/aruneko/gists%7B/gist_id%7D)
- [https://api.github.com/users/aruneko/repos](https://api.github.com/users/aruneko/repos)
- [https://avatars.githubusercontent.com/u/2957726?v=4](https://avatars.githubusercontent.com/u/2957726?v=4)
- [https://api.github.com/users/aruneko/events%7B/privacy%7D](https://api.github.com/users/aruneko/events%7B/privacy%7D)

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