CVE-2026-117537 REDAXO before 5.21.0 Reflected XSS via Metainfo API type Parameter
Low 2.1
Published
Updated
Check this codebase for CVE-2026-117537 and fix it if it is affected.
What it is: CVE-2026-117537 is a low-severity vulnerability in redaxo core, published on 27 Oct 2026.
Exploitation: There is no known exploitation of CVE-2026-117537 in the wild and no public exploit code.
Affected packages and fixed versions:
- redaxo/source (Packagist): affected all versions; fixed in 5.21.0
- redaxo/source (Packagist): affected all versions; fixed in 5.21.0
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-2026-117537/ (Markdown: https://insights.sbomify.com/CVE-2026-117537/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-117537?
CVE-2026-117537 is a low-severity vulnerability in redaxo core, published on 27 Oct 2026.
Official description
REDAXO before 5.21.0 contains a reflected cross-site scripting vulnerability that allows authenticated attackers to inject scripts via the type parameter of the metainfo_default_fields_create API. Attackers can craft a link with a valid CSRF token and HTML payload that rex_view::message() renders unescaped, executing scripts in a victim's backend session.
Weakness: CWE-79
Which versions are affected by CVE-2026-117537?
2 open source packages ship an affected version, including redaxo/source.
| Package | Affected | Fixed in |
|---|---|---|
redaxo/source Packagist | All versions | 5.21.0 |
redaxo/source Packagist | All versions | 5.21.0 |
How do I fix CVE-2026-117537?
Upgrade redaxo/source to 5.21.0 or later.
Is CVE-2026-117537 being exploited?
There is no known exploitation of CVE-2026-117537 in the wild and no public exploit code.
Sources
Also known as GHSA-76pp-mqrq-h425, GHSA-m662-8jrj-cw6v.