# CVE-2025-20255: Other in Cisco Webex Meetings

> An unauthenticated remote attacker can poison HTTP caches in Cisco Webex Meetings, causing clients to receive incorrect responses.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 21 May 2025
- **Updated:** 21 May 2025
- **Also known as:** GHSA-jrwq-36rx-842c

## What is CVE-2025-20255?

CVE-2025-20255 is a medium-severity vulnerability in Cisco Webex Meetings, published on 21 May 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

A vulnerability in client join services of Cisco Webex Meetings could allow an unauthenticated, remote attacker to manipulate cached HTTP responses within the meeting join service.

 This vulnerability is due to improper handling of malicious HTTP requests to the affected service. An attacker could exploit this vulnerability by manipulating stored HTTP responses within the service, also known as HTTP cache poisoning. A successful exploit could allow the attacker to cause the Webex Meetings service to return incorrect HTTP responses to clients.

Weakness: CWE-349 (Acceptance of Extraneous Untrusted Data With Trusted Data)

## Which versions are affected by CVE-2025-20255?

It affects 1 product.


Products: Cisco Webex Meetings.

## How do I fix CVE-2025-20255?

No fix has been published for CVE-2025-20255 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-20255 being exploited?

There is no known exploitation of CVE-2025-20255 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Webex Meetings

- [CVE-2017-12368](https://insights.sbomify.com/CVE-2017-12368/): Memory corruption in Cisco WebEx Recording Format and Advanced Recording Format Players (critical 9.6)
- [CVE-2017-12369](https://insights.sbomify.com/CVE-2017-12369/): Memory corruption in Cisco WebEx Recording Format and Advanced Recording Format Players (critical 9.6)
- [CVE-2017-12370](https://insights.sbomify.com/CVE-2017-12370/): Memory corruption in Cisco WebEx Recording Format and Advanced Recording Format Players (critical 9.6)
- [CVE-2017-12371](https://insights.sbomify.com/CVE-2017-12371/): Memory corruption in Cisco WebEx Recording Format and Advanced Recording Format Players (critical 9.6)
- [CVE-2017-12372](https://insights.sbomify.com/CVE-2017-12372/): Memory corruption in Cisco WebEx Recording Format and Advanced Recording Format Players (critical 9.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-20255 and fix it if it is affected.

What it is: CVE-2025-20255 is a medium-severity vulnerability in Cisco Webex Meetings, published on 21 May 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2025-20255 in the wild and no public exploit code.

Affected product: Cisco Webex Meetings. 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-2025-20255/ (Markdown: https://insights.sbomify.com/CVE-2025-20255/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-20255
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-20255
- OSV: https://osv.dev/vulnerability/CVE-2025-20255

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-20255/
Summaries are generated and may contain mistakes; the official description above is the record.