CVE-2025-32783 XWiki allows unregistered users to see "public" messages from a closed wiki via notifications from a different wiki
Unregistered users can view private messages from closed subwikis via the main wiki dashboard if Message Stream is enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-32783?
CVE-2025-32783 is a medium-severity vulnerability in Xwiki Xwiki, published on 16 Apr 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
XWiki Platform is a generic wiki platform. A vulnerability in versions from 5.0 to 16.7.1 affects users with Message Stream enabled and a wiki configured as closed from selecting "Prevent unregistered users to view pages" in the Administrations Rights. The vulnerability is that any message sent in a subwiki to "everyone" is actually sent to the farm: any visitor of the main wiki will be able to see that message through the Dashboard, even if the subwiki is configured to be private. This issue will not be patched as Message Stream has been deprecated in XWiki 16.8.0RC1 and is not maintained anymore. A workaround for this issue involves keeping Message Stream disabled by default. It's advised to keep it disabled from Administration > Social > Message Stream.
Weakness: CWE-668
Which versions are affected by CVE-2025-32783?
2 open source packages ship an affected version, including org.xwiki.platform:xwiki-platform-messagestream. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.xwiki.platform:xwiki-platform-messagestream Maven | From 5.0 to 16.7.1 | None |
org.xwiki.platform:xwiki-platform-messagestream Maven | From 5.0 to 16.7.1 | None |
Products include Xwiki Xwiki.
How do I fix CVE-2025-32783?
No fix has been published for CVE-2025-32783 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-32783 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-32783 exists.
Other vulnerabilities in Xwiki Xwiki
- CVE-2025-24893 XWiki Platform Eval Injection
- CVE-2025-53836 XWiki Rendering is vulnerable to RCE attacks when processing nested macros
- CVE-2024-55662 XWiki allows remote code execution through the extension sheet
- CVE-2024-55877 XWiki allows remote code execution from account through macro descriptions and XWiki.XWikiSyntaxMacrosList
- CVE-2024-37901 XWiki Platform vulnerable to remote code execution from account via SearchSuggestConfigSheet
Sources
Also known as GHSA-42fh-pvvh-999x.