# CVE-2025-7786: Gnuboard g6 Post Reply qa cross site scripting

> Remote attackers can inject malicious scripts via the Post Reply Handler in Gnuboard g6, potentially leading to code execution or account takeover.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 18 Jul 2025
- **Updated:** 18 Jul 2025
- **Also known as:** GHSA-9ch4-p9xc-vmxf

## What is CVE-2025-7786?

CVE-2025-7786 is a medium-severity cross-site scripting vulnerability in Gnuboard g6, published on 18 Jul 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

A vulnerability, which was classified as problematic, has been found in Gnuboard g6 up to 6.0.10. This issue affects some unknown processing of the file /bbs/scrap_popin_update/qa/ of the component Post Reply Handler. The manipulation leads to cross site scripting. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.

Weakness: CWE-94 (Improper Control of Generation of Code), CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2025-7786?

It affects 1 product.


Products: Sir Gnuboard.

## How do I fix CVE-2025-7786?

No fix has been published for CVE-2025-7786 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-7786 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-7786 exists.

## Other vulnerabilities in Gnuboard g6

- [CVE-2024-41475](https://insights.sbomify.com/CVE-2024-41475/): Misconfiguration in n/a (critical 9.8)
- [CVE-2020-18662](https://insights.sbomify.com/CVE-2020-18662/): SQL injection in n/a (critical 9.8)
- [CVE-2005-0269](https://insights.sbomify.com/CVE-2005-0269/): File upload in n/a (critical 9.8)
- [CVE-2022-1252](https://insights.sbomify.com/CVE-2022-1252/): Use of a Broken or Risky Cryptographic Algorithm in gnuboard/gnuboard5 (high 8.2)
- [CVE-2022-44216](https://insights.sbomify.com/CVE-2022-44216/): Missing authorization in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-7786 and fix it if it is affected.

What it is: CVE-2025-7786 is a medium-severity cross-site scripting vulnerability in Gnuboard g6, published on 18 Jul 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-7786 exists.

Affected product: Gnuboard g6. 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-2025-7786/ (Markdown: https://insights.sbomify.com/CVE-2025-7786/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-7786
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-7786
- OSV: https://osv.dev/vulnerability/CVE-2025-7786

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-7786/
Summaries are generated and may contain mistakes; the official description above is the record.