CVE-2024-55876: xwiki Auth Bypass — Exploit & Fix

Description

XWiki Platform is a generic wiki platform. Starting in version 1.2-milestone-2 and prior to versions 15.10.9 and 16.3.0, any user with an account on the main wiki could run scheduling operations on subwikis. To reproduce, as a user on the main wiki without any special right, view the document `Scheduler.WebHome` in a subwiki. Then, click on any operation (*e.g.,* Trigger) on any job. If the operation is successful, then the instance is vulnerable. This has been patched in XWiki 15.10.9 and 16.3.0. As a workaround, those who have subwikis where the Job Scheduler is enabled can edit the objects on `Scheduler.WebPreferences` to match the patch.

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CVSS v3.1 Score

5.4

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

Weakness Type (CWE)

CWE-862 Missing Authorization

Affected Products

Vendor	Product	Versions
xwiki	xwiki	1.2.1 — 15.10.9
xwiki	xwiki	16.0.0 — 16.3.0
xwiki	xwiki	All
xwiki	xwiki	All
xwiki	xwiki	All
xwiki	xwiki	All
xwiki	xwiki	All

References

Advisories & Patches

https://github.com/xwiki/xwiki-platform/commit/54bcc5a7a2e440cc591b91eece9c13dc0c487331 https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-cwq6-mjmx-47p6 https://jira.xwiki.org/browse/XWIKI-21663 https://jira.xwiki.org/browse/XWIKI-21663

Exploits

https://jira.xwiki.org/browse/XWIKI-21663 https://jira.xwiki.org/browse/XWIKI-21663

Frequently Asked Questions

What is CVE-2024-55876? +

XWiki Platform is a generic wiki platform. Starting in version 1.2-milestone-2 and prior to versions 15.10.9 and 16.3.0, any user with an account on the main wiki could run scheduling operations on subwikis. To reproduce, as a user on the main wiki without any special right, view the document `Scheduler.WebHome` in a subwiki. Then, click on any operation (*e.g.,* Trigger) on any job. If the operation is successful, then the instance is vulnerable. This has been patched in XWiki 15.10.9 and 16.3.0. As a workaround, those who have subwikis where the Job Scheduler is enabled can edit the objects on `Scheduler.WebPreferences` to match the patch. It has a CVSS v3.1 base score of 5.4 (MEDIUM).

How severe is CVE-2024-55876? +

CVE-2024-55876 has a CVSS v3.1 score of 5.4 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-55876? +

CVE-2024-55876 affects products from xwiki, specifically: xwiki. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-55876? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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