# CVE-2015-8770: Path traversal in n/a

> Authenticated attackers can exploit a directory traversal flaw in Roundcube to read arbitrary files or execute code via the skin parameter.

- **Severity:** High 7.5 (`CVSS:3.0/AV:N/AC:H/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:** Yes
- **Published:** 29 Jan 2016
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2015-8770, DLA-392-1, DSA-3541-1, GHSA-xc26-wfvp-2xpj

## What is CVE-2015-8770?

CVE-2015-8770 is a high-severity path traversal vulnerability in n/a, published on 29 Jan 2016. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Directory traversal vulnerability in the set_skin function in program/include/rcmail_output_html.php in Roundcube before 1.0.8 and 1.1.x before 1.1.4 allows remote authenticated users with certain permissions to read arbitrary files or possibly execute arbitrary code via a .. (dot dot) in the _skin parameter to index.php.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2015-8770?

It affects 1 product.


Products: Roundcube Roundcube Webmail.

## How do I fix CVE-2015-8770?

Upgrade to a fixed version.

## Is CVE-2015-8770 being exploited?

There is no known exploitation of CVE-2015-8770 in the wild and no public exploit code.

Public exploit code:

- Roundcube Webmail 1.1.3 - Directory Traversal (exploitdb)

## Other vulnerabilities in n/a

- [CVE-2015-5383](https://insights.sbomify.com/CVE-2015-5383/): Information disclosure in n/a (high 7.5)
- [CVE-2015-5382](https://insights.sbomify.com/CVE-2015-5382/): Path traversal in n/a (medium 6.5)
- [CVE-2015-8794](https://insights.sbomify.com/CVE-2015-8794/): Path traversal in n/a (medium 6.5)
- [CVE-2015-5381](https://insights.sbomify.com/CVE-2015-5381/): Cross-site scripting in n/a (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2015-8770 and fix it if it is affected.

What it is: CVE-2015-8770 is a high-severity path traversal vulnerability in n/a, published on 29 Jan 2016. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2015-8770 in the wild and no public exploit code.

Affected product: n/a. 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-2015-8770/ (Markdown: https://insights.sbomify.com/CVE-2015-8770/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2015-8770
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2015-8770
- OSV: https://osv.dev/vulnerability/CVE-2015-8770

---
From sbomify Insights: https://insights.sbomify.com/CVE-2015-8770/
Summaries are generated and may contain mistakes; the official description above is the record.