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CVE-2026-77026— Joomla Extension - tassos.gr - Client-controlled validation bypass in Convert Forms extension < 5.2.5

Quick assessment

Affected
tassos.gr Convert Forms extension for Joomla
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
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 - tassos.gr - Convert Forms 扩展版本低于 5.2.5 存在客户端控制的验证绕过漏洞。前端提交查看功能未强制执行访问控制，因此未授权用户即可列出表单的提交内容。

CVSS 6.9 · Medium EPSS 0.27% · P19

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProduct Version RangeStatus
tassos.gr Convert Forms extension for Joomla 1.0.0-5.2.5 affected
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I. Basic Information for CVE-2026-77026

Vulnerability Information
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Vulnerability Title
Joomla Extension - tassos.gr - Client-controlled validation bypass in Convert Forms extension < 5.2.5
Source: CVE Program / CVE List V5
Vulnerability Description
Joomla Extension - tassos.gr - Client-controlled validation bypass in Convert Forms extension < 5.2.5 - The front-end Submissions view did not enforce access control. An unauthenticated visitor could therefore list a form's submissions.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端安全的客户端实施
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
tassos.gr Convert Forms extension for Joomla 1.0.0-5.2.5 -

II. Public POCs for CVE-2026-77026

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-77026

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Vendor Pages for CVE-2026-77026 (1)

IV. Related Vulnerabilities

Same product: Convert Forms extension for Joomla
Same vendor: tassos.gr
Same weakness: CWE-602

V. Comments for CVE-2026-77026

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