# CVE-2026-34413: Xerte Online Toolkits Missing Authentication via connector.php

> Unauthenticated attackers can perform file operations and potentially achieve remote code execution due to missing authentication in the elFinder connector endpoint.

- **Severity:** High 8.8 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 22 Apr 2026
- **Updated:** 14 Jul 2026
- **Also known as:** GHSA-g35c-vgp7-f8qm

## What is CVE-2026-34413?

CVE-2026-34413 is a high-severity missing authorization vulnerability in thexerteproject xerteonlinetoolkits, published on 22 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Xerte Online Toolkits versions 3.15 and earlier contain a missing authentication vulnerability in the elFinder connector endpoint at /editor/elfinder/php/connector.php where an HTTP redirect to unauthenticated callers does not call exit() or die(), allowing PHP execution to continue and process the full request server-side. Unauthenticated attackers can perform file operations on project media directories including creating directories, uploading files, renaming files, duplicating files, overwriting files, and deleting files, which can be chained with path traversal and extension blocklist vulnerabilities to achieve remote code execution and arbitrary file read.

Weakness: CWE-497 (Exposure of Sensitive System Information to an Unauthorized Control Sphere)

## Which versions are affected by CVE-2026-34413?


## How do I fix CVE-2026-34413?

No fix has been published for CVE-2026-34413 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-34413 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34413 exists.

Public exploit code:

- Xerte Online Toolkits Arbitrary File Upload - Unauthenticated Media Upload (metasploit)
- Xerte Online Toolkits <= 3.15 - Remote Code Execution (nuclei): http/cves/2026/CVE-2026-34413.yaml

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-34413 and fix it if it is affected.

What it is: CVE-2026-34413 is a high-severity missing authorization vulnerability in thexerteproject xerteonlinetoolkits, published on 22 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34413 exists.

Affected product: thexerteproject xerteonlinetoolkits. 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-2026-34413/ (Markdown: https://insights.sbomify.com/CVE-2026-34413/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-34413
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-34413
- OSV: https://osv.dev/vulnerability/CVE-2026-34413

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-34413/
Summaries are generated and may contain mistakes; the official description above is the record.