# CVE-2021-42365: Asgaros Forums <= 1.15.13 Authenticated Stored XSS

> Administrators can inject arbitrary web scripts via the name parameter in Asgaros Forums, leading to stored XSS in specific configurations.

- **Severity:** Medium 4.8 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 29 Nov 2021
- **Updated:** 13 Feb 2025
- **Also known as:** GHSA-8h56-96mw-r96r

## What is CVE-2021-42365?

CVE-2021-42365 is a medium-severity cross-site scripting vulnerability in Asgaros Forums, published on 29 Nov 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

The Asgaros Forums WordPress plugin is vulnerable to Stored Cross-Site Scripting due to insufficient escaping via the name parameter found in the ~/admin/tables/admin-structure-table.php file which allowed attackers with administrative user access to inject arbitrary web scripts, in versions up to and including 1.15.13. This affects multi-site installations where unfiltered_html is disabled for administrators, and sites where unfiltered_html is disabled.

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

## Which versions are affected by CVE-2021-42365?

It affects 1 product.


Products: Asgaros Asgaros Forum.

## How do I fix CVE-2021-42365?

No fix has been published for CVE-2021-42365 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-42365 being exploited?

There is no known exploitation of CVE-2021-42365 in the wild and no public exploit code.

## Other vulnerabilities in Asgaros Forums

- [CVE-2023-5604](https://insights.sbomify.com/CVE-2023-5604/): Asgaros Forum < 2.7.1 - Unauthenticated Arbitrary File Upload (critical 9.8)
- [CVE-2021-24827](https://insights.sbomify.com/CVE-2021-24827/): Asgaros Forum < 1.15.13 - Unauthenticated SQL Injection (critical 9.8)
- [CVE-2022-0411](https://insights.sbomify.com/CVE-2022-0411/): Asgaros Forum < 2.0.0 - Subscriber+ Blind SQL Injection (high 8.8)
- [CVE-2024-22284](https://insights.sbomify.com/CVE-2024-22284/): WordPress Asgaros Forum Plugin <= 2.7.2 is vulnerable to PHP Object Injection (high 8.7)
- [CVE-2021-25045](https://insights.sbomify.com/CVE-2021-25045/): Asgaros Forum < 1.15.15 - Admin+ SQL Injection via forum_id (high 7.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-42365 and fix it if it is affected.

What it is: CVE-2021-42365 is a medium-severity cross-site scripting vulnerability in Asgaros Forums, published on 29 Nov 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-42365 in the wild and no public exploit code.

Affected product: Asgaros Forums. 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-2021-42365/ (Markdown: https://insights.sbomify.com/CVE-2021-42365/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-42365
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-42365
- OSV: https://osv.dev/vulnerability/CVE-2021-42365

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-42365/
Summaries are generated and may contain mistakes; the official description above is the record.