CVE-2023-26477

CRITICAL

XWiki Platform is a generic wiki platform. Starting in versions 6.3-rc-1 and 6.2.4, it's possible to inject arbitrary wiki syntax including Groovy, Python and Velocity script macros via the `newThe...

Affects 1 product across 1 vendor.

CVSS 3.19.8
EPSS74.8%
Percentile100th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity, no authentication required, no user interaction needed, impact contained to the vulnerable component, full confidentiality impact, full integrity impact, full availability impact.
CWE Weakness Definitions
CWE-94: Code Injection

Attacker injects arbitrary code that is executed by the application process.

CWE-95: CWE-95
Related Attack Patterns (CAPEC)
CAPEC-35 Leverage Executable Code in Non-Executable Files
via CWE-94 CWE-95
CAPEC-77 Manipulating User-Controlled Variables
via CWE-94
CAPEC-242 Code Injection
via CWE-94

Mapping is CWE-to-CAPEC per MITRE CAPEC 3.9.

◆ AI Analysis — automated analysis, not human-reviewed

XWiki Platform versions 6.3-rc-1 and 6.2.4 through 13.10.9, 14.9-rc-1, and 14.4.5 are vulnerable to arbitrary code execution via injection of wiki syntax including Groovy, Python, and Velocity script macros through the `newThemeName` request parameter.

BSID: BS-2023-GLOBAL-061121-C • Model: /workspace/models/qwen2.5-coder-32b-instruct-bf16 • Confidence: HIGH

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Frequently Asked Questions
What is CVE-2023-26477?
XWiki Platform versions 6.3-rc-1 and 6.2.4 through 13.10.9, 14.9-rc-1, and 14.4.5 are vulnerable to arbitrary code execution via injection of wiki syntax including Groovy, Python, and Velocity script macros through the `newThemeName` request parameter.
What is the CVSS score for CVE-2023-26477?
CVE-2023-26477 has CVSS 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS: 74.8%.
Is CVE-2023-26477 actively exploited?
No confirmed active exploitation of CVE-2023-26477 as of 2026-09-25.
How do I remediate CVE-2023-26477?
Priority: IMMEDIATE. Advisory: https://jira.xwiki.org/browse/XWIKI-19757 PSIRT: [email protected]
What systems are affected by CVE-2023-26477?
CVE-2023-26477 affects Xwiki Xwiki.
Vulnerability Details
CVE IDCVE-2023-26477
BSIDBS-2023-GLOBAL-061121-C BreachSpider Global ID
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published2023-03-02
Last Modified2026-06-17
ICS Relevance15%
Weakness (CWE)
Code InjectionCWE-95
SourceNVD
Official Description

XWiki Platform is a generic wiki platform. Starting in versions 6.3-rc-1 and 6.2.4, it's possible to inject arbitrary wiki syntax including Groovy, Python and Velocity script macros via the `newThemeName` request parameter (URL parameter), in combination with additional parameters. This has been patched in the supported versions 13.10.10, 14.9-rc-1, and 14.4.6. As a workaround, it is possible to edit `FlamingoThemesCode.WebHomeSheet` and manually perform the changes from the patch fixing the issue.

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

An attacker can exploit this vulnerability by sending a specially crafted request to the XWiki Platform server, including the `newThemeName` parameter with malicious wiki syntax. This can lead to arbitrary code execution with the privileges of the XWiki server.

Exploitation Likelihood: CRITICAL

Affected Products
VendorProductAffected Versions
Xwiki Xwiki ≥ 6.2.4, < 13.10.10 ≥ 14.0, < 14.4.6 ≥ 14.5, < 14.9
Remediation
View Vendor Advisory →

Remediation Priority: IMMEDIATE

Vendor PSIRT: [email protected]
Threat Intelligence
● Threat Intelligence Validated: October 2026 | Threat Age: 1323 Days
CISA known-exploitedNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
AI Enrichment Record — provenance & audit hash
Model/workspace/models/qwen2.5-coder-32b-instruct-bf16
ConfidenceHIGH
Enriched At2026-05-24
SHA-512 Audit Hashefe3377e6a450366078e53de3e4f7c89dae70706f9b965e90b8fdf134fdbf1a7e3f45226b47a703a1c41522221536328a8e8615260fa8d515ec4dbf8e716760b
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