XWiki Notification Code Injection via 'since' Param (15.0rc1, 14.6)
CVE-2023-29525 Published on April 19, 2023
Privilege escalation from view right on XWiki.Notifications.Code.LegacyNotificationAdministration in xwiki-platform
XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. Affected versions of xwiki are subject to code injection in the `since` parameter of the `/xwiki/bin/view/XWiki/Notifications/Code/LegacyNotificationAdministration` endpoint. This provides an XWiki syntax injection attack via the since-parameter, allowing privilege escalation from view to programming rights and subsequent code execution privilege. The vulnerability has been patched in XWiki 15.0-rc-1, 14.10.3, 14.4.8 and 14.10.3. Users are advised to upgrade. Users unable to upgrade may modify the page `XWiki.Notifications.Code.LegacyNotificationAdministration` to add the missing escaping. For versions < 14.6-rc-1 a workaround is to modify the file `<xwikiwebapp>/templates/distribution/eventmigration.wiki` to add the missing escaping.
Vulnerability Analysis
CVE-2023-29525 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. Public availability of a proof of concept (POC) exploit exists for CVE-2023-29525. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
Weakness Type
What is an Injection Vulnerability?
The software constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. Software has certain assumptions about what constitutes data and control respectively. It is the lack of verification of these assumptions for user-controlled input that leads to injection problems. Injection problems encompass a wide variety of issues -- all mitigated in very different ways and usually attempted in order to alter the control flow of the process. For this reason, the most effective way to discuss these weaknesses is to note the distinct features which classify them as injection weaknesses. The most important issue to note is that all injection problems share one thing in common -- i.e., they allow for the injection of control plane data into the user-controlled data plane. This means that the execution of the process may be altered by sending code in through legitimate data channels, using no other mechanism. While buffer overflows, and many other flaws, involve the use of some further issue to gain execution, injection problems need only for the data to be parsed. The most classic instantiations of this category of weakness are SQL injection and format string vulnerabilities.
CVE-2023-29525 has been classified to as an Injection vulnerability or weakness.
Products Associated with CVE-2023-29525
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Affected Versions
xwiki-platform:- Version < 14.4.8 is affected.
- Version >= 14.5.0, < 14.10.3. is affected.
Vulnerable Packages
The following package name and versions may be associated with CVE-2023-29525
| Package Manager | Vulnerable Package | Versions | Fixed In |
|---|---|---|---|
| maven | org.xwiki.platform:xwiki-platform-distribution-war | >= 12.6.1, < 13.10.11 | 13.10.11 |
| maven | org.xwiki.platform:xwiki-platform-distribution-war | >= 14.0-rc-1, < 14.4.8 | 14.4.8 |
| maven | org.xwiki.platform:xwiki-platform-distribution-war | >= 14.5, < 14.6-rc-1 | 14.6-rc-1 |
| maven | org.xwiki.platform:xwiki-platform-legacy-events-hibernate-ui | >= 14.6-rc-1, < 14.10.3 | 14.10.3 |
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.