# CVE-2026-73671: Saurus CMS Unauthenticated Open Redirect via logout url parameter

> Attackers can redirect authenticated users to malicious sites via the logout URL parameter, enabling phishing and credential theft.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA: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:** 13 Aug 2026
- **Updated:** 14 Aug 2026
- **Also known as:** GHSA-jjjg-67rc-qf87

## What is CVE-2026-73671?

CVE-2026-73671 is a medium-severity vulnerability in Saurus CMS Community Edition, published on 13 Aug 2026. 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

Saurus CMS Community Edition contains an unauthenticated open redirect vulnerability in the logout handling code in classes/port.inc.php, where the url parameter supplied via GET or POST is passed directly to the Location header without domain allowlist, scheme validation, or relative path enforcement. Attackers can craft a malicious logout URL containing an arbitrary external domain or javascript: URI scheme to redirect authenticated users to attacker-controlled phishing pages after session destruction, enabling credential theft and OAuth redirect abuse.

Weakness: CWE-601 (URL Redirection to Untrusted Site)

## Which versions are affected by CVE-2026-73671?


## How do I fix CVE-2026-73671?

No fix has been published for CVE-2026-73671 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-73671 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-73671 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-73671 and fix it if it is affected.

What it is: CVE-2026-73671 is a medium-severity vulnerability in Saurus CMS Community Edition, published on 13 Aug 2026. 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-2026-73671 exists.

Affected product: Saurus CMS Community Edition. 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-2026-73671/ (Markdown: https://insights.sbomify.com/CVE-2026-73671/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-73671
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-73671
- OSV: https://osv.dev/vulnerability/CVE-2026-73671

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-73671/
Summaries are generated and may contain mistakes; the official description above is the record.