XWiki Platform Remote Code Exec via Invitation Vulnerable <15.0
CVE-2023-29518 Published on April 19, 2023

Code injection from view right using Invitation.InvitationCommon in xwiki-platform
XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. Any user with view rights can execute arbitrary Groovy, Python or Velocity code in XWiki leading to full access to the XWiki installation. The root cause is improper escaping of `Invitation.InvitationCommon`. This page is installed by default. The vulnerability has been patched in XWiki 15.0-rc-1, 14.10.1, 14.4.8, and 13.10.11. Users are advised to upgrade. There are no known workarounds for this issue.

Github Repository NVD

Vulnerability Analysis

CVE-2023-29518 is exploitable 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-2023-29518. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality and integrity, and a small impact on availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
LOW
User Interaction:
NONE
Scope:
CHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
LOW

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-2023-29518 has been classified to as an Injection vulnerability or weakness.


Products Associated with CVE-2023-29518

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Xwiki
 

Affected Versions

xwiki-platform:

Vulnerable Packages

The following package name and versions may be associated with CVE-2023-29518

Package Manager Vulnerable Package Versions Fixed In
maven org.xwiki.platform:xwiki-platform-invitation-ui >= 2.5-m-1, < 13.10.11 13.10.11
maven org.xwiki.platform:xwiki-platform-invitation-ui >= 14.0-rc-1, < 14.4.8 14.4.8
maven org.xwiki.platform:xwiki-platform-invitation-ui >= 14.5, < 14.10.1 14.10.1

Exploit Probability

EPSS
1.79%
Percentile
82.50%

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.