# CVE-2025-30090: Cross-site scripting in SquirrelMail

> Attackers can execute arbitrary JavaScript in victim browsers via crafted email headers in SquirrelMail, potentially leading to session hijacking or data theft.

- **Severity:** High 7.2 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 2 Apr 2025
- **Updated:** 2 Apr 2025
- **Also known as:** GHSA-rj9p-v8v3-qjg9, UBUNTU-CVE-2025-30090

## What is CVE-2025-30090?

CVE-2025-30090 is a high-severity cross-site scripting vulnerability in SquirrelMail, published on 2 Apr 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

mime.php in SquirrelMail through 1.4.23-svn-20250401 and 1.5.x through 1.5.2-svn-20250401 allows XSS via e-mail headers, because JavaScript payloads are mishandled after $encoded has been set to true.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2025-30090?


## How do I fix CVE-2025-30090?

No fix has been published for CVE-2025-30090 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-30090 being exploited?

There is no known exploitation of CVE-2025-30090 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-30090 and fix it if it is affected.

What it is: CVE-2025-30090 is a high-severity cross-site scripting vulnerability in SquirrelMail, published on 2 Apr 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-30090 in the wild and no public exploit code.

Affected product: SquirrelMail. 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-2025-30090/ (Markdown: https://insights.sbomify.com/CVE-2025-30090/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-30090
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-30090
- OSV: https://osv.dev/vulnerability/CVE-2025-30090

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-30090/
Summaries are generated and may contain mistakes; the official description above is the record.