CVE-2023-48240
What it is
XWiki Platform is a generic wiki platform. The rendered diff in XWiki embeds images to be able to compare the contents and not display a difference for an actually unchanged image. For this, XWiki requests all embedded images on the server side. These requests are also sent for images from other domains and include all cookies that were sent in the original request to ensure that images with restricted view right can be compared. Starting in version 11.10.1 and prior to versions 14.10.15, 15.5.1, and 15.6, this allows an attacker to steal login and session cookies that allow impersonating the current user who views the diff. The attack can be triggered with an image that references the rendered diff, thus making it easy to trigger. Apart from stealing login cookies, this also allows server-side request forgery (the result of any successful request is returned in the image's source) and viewing protected content as once a resource is cached, it is returned for all users. As only successful requests are cached, the cache will be filled by the first user who is allowed to access the resource. This has been patched in XWiki 14.10.15, 15.5.1 and 15.6. The rendered diff now only downloads images from trusted domains. Further, cookies are only sent when the image's domain is the same the requested domain. The cache has been changed to be specific for each user. As a workaround, the image embedding feature can be disabled by deleting `xwiki-platform-diff-xml-<version>.jar` in `WEB-INF/lib/`.
At a glance
- Exploitability
- Can be exploited over the network with a low-privilege account, but needs a user to act. High risk of data exposure, data tampering, service disruption.
- Exploit odds
- 0.7% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.7% in the next 30 days (EPSS).
- Severity: 9.0 CRITICAL (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.7% · EPSS, next 30 days
- Weakness
- CWE-201
- Record status
- Modified
Affected
- Xwiki < 14.10.15
- Xwiki < 15.5.1
- Xwiki 15.6
Attack profile CVSS 3.1 · 9.0
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Raw vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2023-48240.md and follow it. Check whether this project is affected by CVE-2023-48240. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://github.com/xwiki/xwiki-platform/commit/bff0203e739b6e3eb90af5736f04278c73c2a8bb
- https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-7rfg-6273-f5wp
- https://jira.xwiki.org/browse/XWIKI-20818
- https://github.com/xwiki/xwiki-platform/commit/bff0203e739b6e3eb90af5736f04278c73c2a8bb
- https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-7rfg-6273-f5wp
- https://jira.xwiki.org/browse/XWIKI-20818
References
- https://github.com/xwiki/xwiki-platform/commit/bff0203e739b6e3eb90af5736f04278c73c2a8bb
- https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-7rfg-6273-f5wp
- https://jira.xwiki.org/browse/XWIKI-20818
- https://github.com/xwiki/xwiki-platform/commit/bff0203e739b6e3eb90af5736f04278c73c2a8bb
- https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-7rfg-6273-f5wp
- https://jira.xwiki.org/browse/XWIKI-20818