CVE-2023-30537
Published: 16 April 2023
Summary
CVE-2023-30537 is a critical-severity Eval Injection (CWE-95) vulnerability in Xwiki Xwiki. Its CVSS base score is 9.9 (Critical).
Operationally, ranked in the top 3.3% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
XWiki Platform contains a code injection vulnerability tracked as CVE-2023-30537 that affects the default-installed FlamingoThemesCode.WebHome page. The root cause is improper escaping of the page's styles properties, which permits any user granted the right to add an object to a page to execute arbitrary Groovy, Python, or Velocity code and obtain full control of the XWiki installation. The issue is assigned CWE-95 and CWE-94 and carries a CVSS 3.1 score of 9.9.
An attacker needs only object-creation privileges on a reachable page; no additional user interaction or special network position is required. Successful exploitation yields complete read, write, and administrative access to the wiki instance, including the ability to run server-side scripts with the privileges of the XWiki process.
Public advisories and the referenced commits state that the vulnerability is fixed in XWiki 13.10.11, 14.4.7, and 14.10; administrators are advised to upgrade to one of these releases. The associated GitHub Security Advisory GHSA-vrr8-fp7c-7qgp and XWIKI-20280 provide the patch details and upgrade guidance.
The EPSS score has remained steady at its peak value of 0.2936 since disclosure, indicating sustained but not sharply increasing exploitation interest.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-1398
Vulnerability details
XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. Any user with the right to add an object on a page can execute arbitrary Groovy, Python or Velocity code in XWiki leading…
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to full access to the XWiki installation. The root cause is improper escaping of the styles properties `FlamingoThemesCode.WebHome`. This page is installed by default. The vulnerability has been patched in XWiki versions 13.10.11, 14.4.7 and 14.10.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Makes persistent code injection into loaded programs impossible when the executable image itself resides on hardware-protected read-only media.
Dynamically generated code can be produced and executed inside the isolated chamber, preventing host compromise from code-injection payloads.
Validates inputs used in dynamic code generation to block injected directives.
Directly prevents execution of attacker-supplied code written into data memory regions.