Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:HCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2023-35158 is a critical-severity Improper Neutralization of Alternate XSS Syntax (CWE-87) vulnerability in Xwiki Xwiki. Its CVSS base score is 9.6 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Steganography (T1001.002); ranked in the top 19% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
XWiki Platform, a generic wiki platform, contains a reflected cross-site scripting vulnerability in its restore template that permits arbitrary JavaScript injection via crafted URLs. The flaw has existed since version 9.4-rc-1 and allows an attacker-supplied xredirect parameter containing a javascript: URI to execute in the context of the application when the page is rendered with parameters such as xpage=restore and showBatch=true.
An unauthenticated remote attacker can exploit the issue by persuading a victim to visit a maliciously constructed link, resulting in script execution that can achieve confidentiality, integrity, and availability impacts within the wiki application. The CVSS 3.1 score of 9.6 reflects the combination of network attack vector, low complexity, no required privileges, and changed scope.
Official patches are available in XWiki 14.10.5 and 15.1-rc-1; the corresponding commits and security advisory on GitHub document the fix for the restore template handling. The associated EPSS score rose from low values after disclosure to a peak of 0.3180 on 2025-01-22 before receding, indicating a period of increased exploitation interest.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-1847
Vulnerability Data
XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. Users are able to forge an URL with a payload allowing to inject Javascript in the page (XSS). It's possible to exploit the…
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restore template to perform a XSS, e.g. by using URL such as: > /xwiki/bin/view/XWiki/Main?xpage=restore&showBatch=true&xredirect=javascript:alert(document.domain). This vulnerability exists since XWiki 9.4-rc-1. The vulnerability has been patched in XWiki 14.10.5 and 15.1-rc-1.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Secure SDLC practices directly require proper input neutralization and output encoding to prevent alternate XSS syntax.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
A.8.25 mandates secure SDLC practices including secure coding guidelines, security requirements, checkpoints, testing (scans/penetration), and developer training that reach alternate XSS syntax neutralization when applied to web output handling; this stops exploitation in covered projects but leaves a bounded remainder (unrigorous implementation, non-web contexts, or outsourced development without full assurance per 8.30).
Application security requirements explicitly call for neutralization of untrusted input to block XSS variants.
A.8.27 mandates security-by-design principles (including data validation/sanitization, distrust external input, defense-in-depth, secure architecture reviews against attack patterns) that reach alternate XSS syntax when applied to input handling, but leaves a bounded remainder where implementation is incomplete, outsourced development deviates, or specific alternate syntaxes are unaddressed in the review.
Secure coding standards require proper neutralization of alternate script syntax, directly eliminating CWE-87.
Security testing catches residual XSS but does not itself implement the neutralization controls.