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CVE-2026-88853— Joomla Extension - regularlabs.com - Privileged stored XSS via event handler option in Modals Pro extension for Joomla < 17.0.0

Quick assessment

Affected
regularlabs.com Modals (Pro) 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 – regularlabs.com – Modals Pro 扩展（Joomla < 17.0.0）通过“事件处理程序选项”导致的高权限存储型跨站脚本（XSS）漏洞 Modals Pro 扩展有意支持 JavaScript 事件（例如 on-open 和 on-closed）。受影响的版本未能区分受信任的扩展配置与在普通文章内容中提供的事件代码。因此，权限较低的作者可以利用该文档中记录的、本应仅保留给受信任作者使用的可执行功能，从而触发漏洞。

CVSS 7.5 · High EPSS 0.42% · P36

Affected Version Matrix 1

VendorProduct Version RangeStatus
regularlabs.com Modals (Pro) extension for Joomla 4.7.0-16.2.0 affected
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I. Basic Information for CVE-2026-88853

Vulnerability Information
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Vulnerability Title
Joomla Extension - regularlabs.com - Privileged stored XSS via event handler option in Modals Pro extension for Joomla < 17.0.0
Source: CVE Program / CVE List V5
Vulnerability Description
Joomla Extension - regularlabs.com - Privileged stored XSS via event handler option in Modals Pro extension for Joomla < 17.0.0 - Modals Pro intentionally supports JavaScript Events such as on-open and on-closed. Affected versions do not distinguish trusted extension configuration from event code supplied in ordinary article content. A lower-privileged author can therefore use a documented executable feature which should be reserved for trusted authors.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/S:N/AU:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
regularlabs.com Modals (Pro) extension for Joomla 4.7.0-16.2.0 -

II. Public POCs for CVE-2026-88853

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-88853

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Vendor Pages for CVE-2026-88853 (1)

Same Patch Batch · regularlabs.com · 2026-09-14 · 9 CVEs total

CVE-2026-85192 9.4 CRITICAL Joomla Extension - regularlabs.com - Authenticated, privileged remote code execution in Co
CVE-2026-85195 7.5 HIGH Joomla Extension - regularlabs.com - Privileged stored XSS via link option in Articles Any
CVE-2026-85191 7.5 HIGH Joomla Extension - regularlabs.com - Privileged stored XSS via rtla-alias option in Tabs &
CVE-2026-85190 7.5 HIGH Joomla Extension - regularlabs.com - Privileged stored XSS via class option in Quick Index
CVE-2026-85189 7.5 HIGH Joomla Extension - regularlabs.com - Privileged stored XSS via executable URL schemes in M
CVE-2026-88852 7.5 HIGH Joomla Extension - regularlabs.com - Privileged stored XSS via url option in Snippets Free
CVE-2026-85188 6.9 MEDIUM Joomla Extension - regularlabs.com - Database data disclosure in Advanced Module Manager (
CVE-2026-85196 5.3 MEDIUM Joomla Extension - regularlabs.com - Reflected XSS in Articles Anywhere extension for Joom

IV. Related Vulnerabilities

Same vendor: regularlabs.com
Same weakness: CWE-79