# CVE-2025-65754: Algernon Cross-Site Scripting vulnerability

> Attackers can execute arbitrary code by injecting crafted payloads into filenames in the Algernon web server.

- **Severity:** Medium 6.1 (`CVSS:3.1/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:** Yes
- **Published:** 10 Dec 2025
- **Updated:** 18 Dec 2025
- **Also known as:** GHSA-8jqm-8qm3-qgqm, GO-2025-4228

## What is CVE-2025-65754?

CVE-2025-65754 is a medium-severity cross-site scripting vulnerability in n/a, published on 10 Dec 2025. 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

Cross Site Scripting vulnerability in Algernon v1.17.4 allows attackers to execute arbitrary code via injecting a crafted payload into a filename.

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

## Which versions are affected by CVE-2025-65754?

3 open source packages ship an affected version, including github.com/xyproto/algernon. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `github.com/xyproto/algernon` | Go | All versions | 1.17.5 |
| `github.com/xyproto/algernon` | Go | All versions | 1.17.5 |
| `github.com/xyproto/algernon` | Go | All versions | 1.17.5 |

Products: Algernon Project Algernon.

## How do I fix CVE-2025-65754?

Upgrade github.com/xyproto/algernon to 1.17.5 or later.

## Is CVE-2025-65754 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-65754 exists.

Public exploit code:

- Algernon v1.17.4 is affected by a Cross-Site Scripting (XSS) vulnerability that allows attackers to execute arbitrary code via a crafted payload into a filename. (github_poc): https://github.com/Bnyt7/CVE-2025-65754

## Other vulnerabilities in n/a

- [CVE-2023-26131](https://insights.sbomify.com/CVE-2023-26131/): Algernon engine and themes vulnerable to Cross-site Scripting (medium 5.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-65754 and fix it if it is affected.

What it is: CVE-2025-65754 is a medium-severity cross-site scripting vulnerability in n/a, published on 10 Dec 2025. An attacker can exploit it over the internet without logging in, 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-2025-65754 exists.

Affected packages and fixed versions:
- github.com/xyproto/algernon (Go): affected all versions; fixed in 1.17.5
- github.com/xyproto/algernon (Go): affected all versions; fixed in 1.17.5
- github.com/xyproto/algernon (Go): affected all versions; fixed in 1.17.5

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-2025-65754/ (Markdown: https://insights.sbomify.com/CVE-2025-65754/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-65754
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-65754
- OSV: https://osv.dev/vulnerability/CVE-2025-65754

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-65754/
Summaries are generated and may contain mistakes; the official description above is the record.