# CVE-2020-14933: Deserialization in n/a

> Untrusted input in SquirrelMail's compose.php is passed to unserialize, potentially allowing PHP object injection and code execution.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Jun 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-gh2w-wqm3-32m4

## What is CVE-2020-14933?

CVE-2020-14933 is a high-severity unsafe deserialization vulnerability in Squirrelmail Squirrelmail, published on 20 Jun 2020. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

compose.php in SquirrelMail 1.4.22 calls unserialize for the $attachments value, which originates from an HTTP POST request. NOTE: the vendor disputes this because these two conditions for PHP object injection are not satisfied: existence of a PHP magic method (such as __wakeup or __destruct), and any attack-relevant classes must be declared before unserialize is called (or must be autoloaded).

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2020-14933?

It affects 1 product.


Products: Squirrelmail Squirrelmail.

## How do I fix CVE-2020-14933?

No fix has been published for CVE-2020-14933 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-14933 being exploited?

There is no known exploitation of CVE-2020-14933 in the wild and no public exploit code.

## Other vulnerabilities in Squirrelmail Squirrelmail

- [CVE-2002-0516](https://insights.sbomify.com/CVE-2002-0516/): Command injection in n/a (critical 10.0)
- [CVE-2020-14932](https://insights.sbomify.com/CVE-2020-14932/): Deserialization in n/a (critical 9.8)
- [CVE-2017-7692](https://insights.sbomify.com/CVE-2017-7692/): Command injection in n/a (high 8.8)
- [CVE-2007-2631](https://insights.sbomify.com/CVE-2007-2631/): Cross-site request forgery in n/a (high 7.5)
- [CVE-2006-2842](https://insights.sbomify.com/CVE-2006-2842/): Code injection in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-14933 and fix it if it is affected.

What it is: CVE-2020-14933 is a high-severity unsafe deserialization vulnerability in Squirrelmail Squirrelmail, published on 20 Jun 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-14933 in the wild and no public exploit code.

Affected product: Squirrelmail 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-2020-14933/ (Markdown: https://insights.sbomify.com/CVE-2020-14933/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-14933
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-14933
- OSV: https://osv.dev/vulnerability/CVE-2020-14933

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-14933/
Summaries are generated and may contain mistakes; the official description above is the record.