# CVE-2018-15596: Cross-site scripting in n/a

> Attackers can inject malicious scripts via unsanitized thread titles in RSS feeds, potentially leading to session hijacking or code execution.

- **Severity:** Medium 6.1 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/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:** A user has to click or open something
- **Fix available:** No
- **Published:** 28 Aug 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-m5q2-3g9r-qm3p

## What is CVE-2018-15596?

CVE-2018-15596 is a medium-severity cross-site scripting vulnerability in Mybb Mybb, published on 28 Aug 2018. 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

An issue was discovered in inc/class_feedgeneration.php in MyBB 1.8.17. On the forum RSS Syndication page, one can generate a URL such as http://localhost/syndication.php?fid=&type=atom1.0&limit=15. The thread titles (within title elements of the generated XML documents) aren't sanitized, leading to XSS.

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

## Which versions are affected by CVE-2018-15596?

It affects 1 product.


Products: Mybb Mybb.

## How do I fix CVE-2018-15596?

No fix has been published for CVE-2018-15596 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-15596 being exploited?

There is no known exploitation of CVE-2018-15596 in the wild and no public exploit code.

Public exploit code:

- MyBB 1.8.17 - Cross-Site Scripting (exploitdb)

## Other vulnerabilities in Mybb Mybb

- [CVE-2011-10018](https://insights.sbomify.com/CVE-2011-10018/): myBB 1.6.4 Backdoor Arbitrary Command Execution (critical 10.0)
- [CVE-2015-2786](https://insights.sbomify.com/CVE-2015-2786/): Information disclosure in n/a (critical 10.0)
- [CVE-2011-5133](https://insights.sbomify.com/CVE-2011-5133/): Cross-site scripting in n/a (critical 10.0)
- [CVE-2006-0218](https://insights.sbomify.com/CVE-2006-0218/): SQL injection in n/a (critical 10.0)
- [CVE-2020-22612](https://insights.sbomify.com/CVE-2020-22612/): Code injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-15596 and fix it if it is affected.

What it is: CVE-2018-15596 is a medium-severity cross-site scripting vulnerability in Mybb Mybb, published on 28 Aug 2018. 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-2018-15596 in the wild and no public exploit code.

Affected product: Mybb Mybb. 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-2018-15596/ (Markdown: https://insights.sbomify.com/CVE-2018-15596/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-15596
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-15596
- OSV: https://osv.dev/vulnerability/CVE-2018-15596

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-15596/
Summaries are generated and may contain mistakes; the official description above is the record.