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CVE-2026-74253— Joomla Extension - regularlabs.com - Unauthenticated RCE through unverified reflected user input in Sourcerer < 14.0.0

Quick assessment

Affected
regularlabs.com Sourcerer extension for Joomla
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Joomla 扩展程序 - regularlabs.com - 通过 Sourcerer 版本小于 14.0.0 中未经验证的反射性用户输入实现未认证远程代码执行（RCE） - Regular Labs Sourcerer 在 14.0.0 版本之前，在处理 Joomla 最终渲染 HTML 中找到的 {source} 代码块时，未可靠地验证这些代码的来源。

CVSS 10.0 · Critical EPSS 0.32% · P25

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
regularlabs.com Sourcerer extension for Joomla 1.0.0-13.1.1 affected
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I. Basic Information for CVE-2026-74253

Vulnerability Information
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Vulnerability Title
Joomla Extension - regularlabs.com - Unauthenticated RCE through unverified reflected user input in Sourcerer < 14.0.0
Source: CVE Program / CVE List V5
Vulnerability Description
Joomla Extension - regularlabs.com - Unauthenticated RCE through unverified reflected user input in Sourcerer < 14.0.0 - Regular Labs Sourcerer before 14.0.0 processes {source} blocks found in Joomla’s final rendered HTML without reliably determining where that code originated.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
regularlabs.com Sourcerer extension for Joomla 1.0.0-13.1.1 -

II. Public POCs for CVE-2026-74253

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
default-local-qwen3.6 · 9432 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
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POC zip download
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III. Intelligence Information for CVE-2026-74253

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Vendor Pages for CVE-2026-74253 (1)

IV. Related Vulnerabilities

Same product: Sourcerer extension for Joomla
Same vendor: regularlabs.com
Same weakness: CWE-94

V. Comments for CVE-2026-74253

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