# CVE-2025-20345: Cisco Duo Authentication Proxy Information Disclosure Vulnerability

> High-privileged attackers can view sensitive information in system logs due to insufficient masking in Cisco Duo Authentication Proxy.

- **Severity:** Medium 4.9 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Aug 2025
- **Updated:** 20 Aug 2025
- **Also known as:** GHSA-xrhj-pq48-gcwm

## What is CVE-2025-20345?

CVE-2025-20345 is a medium-severity vulnerability in Cisco Duo Authentication Proxy, published on 20 Aug 2025. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A vulnerability in the debug logging function of Cisco Duo Authentication Proxy could allow an authenticated, high-privileged, remote attacker to view sensitive information in a system log file.

This vulnerability is due to insufficient masking of sensitive information before it is written to system log files. An attacker could exploit this vulnerability by accessing logs on an affected system. A successful exploit could allow the attacker to view sensitive information that should be restricted. 

Weakness: CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2025-20345?


## How do I fix CVE-2025-20345?

No fix has been published for CVE-2025-20345 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-20345 being exploited?

There is no known exploitation of CVE-2025-20345 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-20345 and fix it if it is affected.

What it is: CVE-2025-20345 is a medium-severity vulnerability in Cisco Duo Authentication Proxy, published on 20 Aug 2025. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-20345 in the wild and no public exploit code.

Affected product: Cisco Duo Authentication Proxy. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-20345/ (Markdown: https://insights.sbomify.com/CVE-2025-20345/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-20345
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-20345
- OSV: https://osv.dev/vulnerability/CVE-2025-20345

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-20345/
Summaries are generated and may contain mistakes; the official description above is the record.