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CVE-2026-48902— Joomla! Core - [20260518] - Transport encryption downgrade for password and username reset links

Quick assessment

Affected
Joomla! Project Joomla! CMS
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! CMS是Joomla!开源的一个内容管理系统。 Joomla! CMS存在安全漏洞，该漏洞源于密码和用户名重置功能在未明确设置强制SSL标志时，为HTTPS连接创建了明文HTTP链接。

AI Predicted 5.3 Difficulty: Easy EPSS 0.33% · P23

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle

Affected Version Matrix 2

VendorProduct Version RangeStatus
Joomla! Project Joomla! CMS 3.9.0-5.4.5 affected
6.0.0-6.1.0 affected
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I. Basic Information for CVE-2026-48902

Vulnerability Information
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Vulnerability Title
Joomla! Core - [20260518] - Transport encryption downgrade for password and username reset links
Source: CVE Program / CVE List V5
Vulnerability Description
The password and username reset features created plain http links for https connections if the "Force SSL" flag wasn't explicitly set.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Joomla! CMS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Joomla! CMS是Joomla!开源的一个内容管理系统。 Joomla! CMS存在安全漏洞，该漏洞源于密码和用户名重置功能在未明确设置强制SSL标志时，为HTTPS连接创建了明文HTTP链接。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Joomla! Project Joomla! CMS 3.9.0-5.4.5 -

II. Public POCs for CVE-2026-48902

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III. Intelligence Information for CVE-2026-48902

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Vendor Advisories for CVE-2026-48902 (1)

Same Patch Batch · Joomla! Project · 2026-05-26 · 20 CVEs total

CVE-2026-48905 Joomla! Framework - [20260520] - Inadequate content filtering within the cleanAttributes f
CVE-2026-30894 Joomla! Core - [20260503] - XSS in com_contenthistory
CVE-2026-30895 Joomla! Core - [20260504] - XSS in readmore links
CVE-2026-40383 Joomla! Core - [20260509] - LFI in HTMLView layout parameter
CVE-2026-40384 Joomla! Core - [20260510] - Path traversal in com_media webservice endpoint
CVE-2026-35221 Joomla! Core - [20260506] - Authenticated blind SQLi in com_finder
CVE-2026-35222 Joomla! Core - [20260507] - Authenticated blind SQLi in com_tags
CVE-2026-35220 Joomla! Core - [20260505] - CSRF in user activation endpoint
CVE-2026-35223 Joomla! Core - [20260508] - Improper access check in com_config webservice endpoints
CVE-2026-48903 Joomla! Framework - [20260519] - Inadequate content filtering within the checkAttribute fi
CVE-2026-25901 Joomla! Core - [20260502] - XSS in com_associations
CVE-2026-48904 Joomla! Core - [20260514] - Privilege escalation through com_users webservice endpoints
CVE-2026-48897 Joomla! Core - [20260512] - MFA Authentication Bypass
CVE-2026-48896 Joomla! Core - [20260511] - MFA Authentication Bypass
CVE-2026-48898 Joomla! Core - [20260513] - Privilege escalation through com_users batch task
CVE-2026-48899 Joomla! Core - [20260515] - Incorrect Access Control in sample data plugins
CVE-2026-48900 Joomla! Core - [20260516] - Incorrect Access Control in com_scheduler
CVE-2026-48901 Joomla! Core - [20260517] - Incorrect Cache Key Construction for InputFilter objects
CVE-2026-25900 Joomla! Core - [20260501] - XSS in feed modules

IV. Related Vulnerabilities

Same product: Joomla! CMS
Same vendor: Joomla! Project

V. Comments for CVE-2026-48902

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