---
title: "CVE-2025-24813: Apache Tomcat Path Equivalence Vulnerability"
url: https://erroneo.us/security/cve/CVE-2025-24813/
description: "CVE-2025-24813 (Apache Tomcat): Exploited in the wild (CISA KEV). Path Equivalence: 'file.Name' (Internal Dot) leading to Remote Code Execution and/or…"
type: vulnerability-record
section: "Security Digest"
date_published: 2025-03-10
date_modified: 2026-10-21
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2025-24813"
kev: true
cvss: 9.2
epss: 0.99927
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2025-24813: Apache Tomcat Path Equivalence Vulnerability

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run Apache Tomcat. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2025-04-01, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2025-04-22 ; treat that as the outer limit, not the target.
- EPSS 99.9% , percentile 100.0: FIRST’s model estimates a 99.9% chance of exploitation activity in the next 30 days, higher than 100.0% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes org.apache.tomcat:tomcat-catalina (Maven) >= 11.0.0-M1, < 11.0.3, fixed in 11.0.3 ; org.apache.tomcat:tomcat-catalina (Maven) >= 10.1.0-M1, < 10.1.35, fixed in 10.1.35 ; org.apache.tomcat:tomcat-catalina (Maven) >= 9.0.0.M1, < 9.0.99, fixed in 9.0.99 ; org.apache.tomcat.embed:tomcat-embed-core (Maven) >= 11.0.0-M1, < 11.0.3, fixed in 11.0.3 . Check your lockfile, including transitive dependencies.
- Editorial verdict: Most can relax. Apache Tomcat Partial PUT RCE (CVE-2025-24813) — It is in KEV and attacks were seen within days, but exploitation needs the default servlet's write support turned on, which is off by default and rare; upgrade on your normal cycle and check that one setting.

## What it is

Path Equivalence: 'file.Name' (Internal Dot) leading to Remote Code Execution and/or Information disclosure and/or malicious content added to uploaded files via write enabled Default Servlet in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.2, from 10.1.0-M1 through 10.1.34, from 9.0.0.M1 through 9.0.98. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 though 8.5.100. Other, older, EOL versions may also be affected. If all of the following were true, a malicious user was able to view security sensitive files and/or inject content into those files: - writes enabled for the default servlet (disabled by default) - support for partial PUT (enabled by default) - a target URL for security sensitive uploads that was a sub-directory of a target URL for public uploads - attacker knowledge of the names of security sensitive files being uploaded - the security sensitive files also being uploaded via partial PUT If all of the following were true, a malicious user was able to perform remote code execution: - writes enabled for the default servlet (disabled by default) - support for partial PUT (enabled by default) - application was using Tomcat's file based session persistence with the default storage location - application included a library that may be leveraged in a deserialization attack Users are recommended to upgrade to version 11.0.3, 10.1.35 or 9.0.99, which fixes the issue.

## Affected packages

- Maven `org.apache.tomcat:tomcat-catalina` >= 11.0.0-M1, < 11.0.3 → fixed: 11.0.3
- Maven `org.apache.tomcat:tomcat-catalina` >= 10.1.0-M1, < 10.1.35 → fixed: 10.1.35
- Maven `org.apache.tomcat:tomcat-catalina` >= 9.0.0.M1, < 9.0.99 → fixed: 9.0.99
- Maven `org.apache.tomcat.embed:tomcat-embed-core` >= 11.0.0-M1, < 11.0.3 → fixed: 11.0.3
- Maven `org.apache.tomcat.embed:tomcat-embed-core` >= 10.1.0-M1, < 10.1.35 → fixed: 10.1.35
- Maven `org.apache.tomcat.embed:tomcat-embed-core` >= 9.0.0.M1, < 9.0.99 → fixed: 9.0.99
- Maven `org.apache.tomcat:tomcat-catalina` >= 8.5.0, <= 8.5.100 → fixed: none listed
- Maven `org.apache.tomcat.embed:tomcat-embed-core` >= 8.5.0, <= 8.5.100 → fixed: none listed

## Affected products (CVE record)

- Apache Software Foundation Apache Tomcat: 11.0.0-M1 <= 11.0.2, 10.1.0-M1 <= 10.1.34, 9.0.0.M1 <= 9.0.98, 8.5.0 <= 8.5.100

## Severity

- CISA-ADP CVSS 3.1: 10 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`
- GitHub CVSS 4.0: 9.2 `CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A`

## Exploitation

- CISA KEV: added 2025-04-01; federal due date 2025-04-22. Known ransomware use: Unknown.
- CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- CISA SSVC assessment: exploitation active , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 99.93% probability of exploitation activity in the next 30 days; percentile 100.0.

## Sources

- [lists.apache.org](https://lists.apache.org/thread/j5fkjv2k477os90nczf2v9l61fb0kkgq)
- [GitHub Advisory GHSA-83qj-6fr2-vhqg](https://github.com/advisories/GHSA-83qj-6fr2-vhqg)
- [CVE.org record CVE-2025-24813](https://www.cve.org/CVERecord?id=CVE-2025-24813)
- [NVD entry CVE-2025-24813](https://nvd.nist.gov/vuln/detail/CVE-2025-24813)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-24813)
- [openwall.com](http://www.openwall.com/lists/oss-security/2025/03/10/5)
- [vicarius.io](https://www.vicarius.io/vsociety/posts/cve-2025-24813-detect-apache-tomcat-rce)
- [vicarius.io](https://www.vicarius.io/vsociety/posts/cve-2025-24813-mitigate-apache-tomcat-rce)
- [security.netapp.com](https://security.netapp.com/advisory/ntap-20250321-0001/)
- [lists.debian.org](https://lists.debian.org/debian-lts-announce/2025/04/msg00003.html)
- [vicarius.io](https://www.vicarius.io/vsociety/posts/cve-2025-24813-tomcat-detect-vulnerability)
- [vicarius.io](https://www.vicarius.io/vsociety/posts/cve-2025-24813-tomcat-mitigation-vulnerability)
- [github.com](https://github.com/absholi7ly/POC-CVE-2025-24813/blob/main/README.md)
- [github.com](https://github.com/apache/tomcat/commit/0a668e0c27f2b7ca0cc7c6eea32253b9b5ecb29c)
- [github.com](https://github.com/apache/tomcat/commit/eb61aade8f8daccaecabf07d428b877975622f72)
- [github.com](https://github.com/apache/tomcat/commit/f6c01d6577cf9a1e06792be47e623d36acc3b5dc)

---
Source page: https://erroneo.us/security/cve/CVE-2025-24813/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt