CVE-2026-34413 PoC — Xerte Online Toolkits Missing Authentication via connector.php

Source

https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-34413.yaml

Associated Vulnerability

Title: Xerte Online Toolkits Missing Authentication via connector.php (CVE-2026-34413)
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.

Description

Xerte Online Toolkits versions 3.15 and earlier expose the elFinder file manager connector at /editor/elfinder/php/connector.php without authentication (CVE-2026-34413), because the access-control redirect for unauthenticated users does not call exit()/die() and execution continues server-side. This is chained with a relative path traversal in the elFinder rename command (CVE-2026-34414) and an incomplete file-extension blocklist that still permits .php4 (CVE-2026-34415) to write an attacker-controlled PHP file into the application root, resulting in unauthenticated remote code execution.

File Snapshot

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