CVE-2026-33229: Xwiki platform oldcore Remote Code Execution Vulnerability

HIGH
Advisory Identifier: GHSA-h259-74h5-4rh9
Share
CWE-862
Published
Advisory Summary

CVE-2026-33229 is a HIGH remote code execution vulnerability (CWE-862: Missing Authorization) affecting Xwiki platform oldcore libraries in the Maven ecosystem. The issue involves xwiki vulnerable to remote code execution with script right through unprotected velocity scripting api. Remediation is available by upgrading affected packages to version 17.4.8, 17.10.1.

CVE-2026-33229 at a Glance

CVE Identifier CVE-2026-33229
GHSA Identifier GHSA-h259-74h5-4rh9
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-862: Missing Authorization
Affected Product Xwiki platform oldcore
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-33229

To remediate this vulnerability, upgrade all affected Xwiki platform oldcore dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.xwiki.platform:xwiki-platform-oldcore fixed: 17.4.8 
<dependency>
    <groupId>org.xwiki.platform</groupId>
    <artifactId>xwiki-platform-oldcore</artifactId>
    <version>17.4.8</version>
</dependency>
org.xwiki.platform:xwiki-platform-oldcore fixed: 17.10.1 
<dependency>
    <groupId>org.xwiki.platform</groupId>
    <artifactId>xwiki-platform-oldcore</artifactId>
    <version>17.10.1</version>
</dependency>
org.xwiki.platform:xwiki-platform-legacy-oldcore fixed: 17.4.8 
<dependency>
    <groupId>org.xwiki.platform</groupId>
    <artifactId>xwiki-platform-legacy-oldcore</artifactId>
    <version>17.4.8</version>
</dependency>
org.xwiki.platform:xwiki-platform-legacy-oldcore fixed: 17.10.1 
<dependency>
    <groupId>org.xwiki.platform</groupId>
    <artifactId>xwiki-platform-legacy-oldcore</artifactId>
    <version>17.10.1</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.xwiki.platform

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-33229, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.xwiki.platform

Analyze the terminal output to locate any version of Xwiki platform oldcore in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 17.4.8), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.xwiki.platform command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-862: Missing Authorization, where the product does not perform an authorization check when an actor attempts to access a resource or perform an action. In Xwiki platform oldcore, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact An improperly protected scripting API allows any user with script right to bypass the sandboxing of the Velocity scripting API and execute, e.g., arbitrary Python scripts, allowing full access to the XWiki instance and thereby compromising the confidentiality, integrity and availability of the whole instance. Note that script right already constitutes a high level of access that we don't recommend giving to untrusted users. ### Patches The vulnerability has been patched in XWiki 17.4.8 and 17.10.1 by requiring programming right to access the affected scripting API. ### Workarounds We're not aware of any workarounds except for being careful whom you grant script right. ### Attribution We thank Youssef Azefzaf for discovering and reporting this vulnerability.

CVE-2026-33229 Affected Xwiki platform oldcore Versions

4 component(s)
Fixed Versions:
17.4.817.10.1
Product / Package Ecosystem Affected Versions Fixed Version
org.xwiki.platform:xwiki-platform-oldcore
maven/org.xwiki.platform/xwiki-platform-oldcore
Maven
≥ 17.0.0-rc-1
< 17.4.8
17.4.8
org.xwiki.platform:xwiki-platform-oldcore
maven/org.xwiki.platform/xwiki-platform-oldcore
Maven
≥ 17.5.0-rc-1
< 17.10.1
17.10.1
org.xwiki.platform:xwiki-platform-legacy-oldcore
maven/org.xwiki.platform/xwiki-platform-legacy-oldcore
Maven
≥ 17.0.0-rc-1
< 17.4.8
17.4.8
org.xwiki.platform:xwiki-platform-legacy-oldcore
maven/org.xwiki.platform/xwiki-platform-legacy-oldcore
Maven
≥ 17.5.0-rc-1
< 17.10.1
17.10.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-h259-74h5-4rh9
NVD — CVE-2026-33229 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-33229
Security Fix Commit FIX COMMIT
https://github.com/xwiki/xwiki-platform/commit/9fe84da66184c05953df9466cf3a4acd15a46e63
Xwiki platform oldcore Source Repository REPOSITORY
https://github.com/xwiki/xwiki-platform
jira.xwiki.org/browse/xwiki-23698 WEB
https://jira.xwiki.org/browse/XWIKI-23698
jira.xwiki.org/browse/xwiki-23702 WEB
https://jira.xwiki.org/browse/XWIKI-23702

Frequently Asked Questions

What is CVE-2026-33229?
CVE-2026-33229 is a security vulnerability in Xwiki platform oldcore involving XWiki vulnerable to remote code execution with script right through unprotected Velocity scripting API under CWE-862: Missing Authorization.
Which Xwiki platform oldcore versions are affected?
Affected versions include releases prior to 17.4.8, 17.10.1 across affected packages: org.xwiki.platform:xwiki-platform-oldcore, org.xwiki.platform:xwiki-platform-legacy-oldcore.
What version fixes CVE-2026-33229?
Upgrading to 17.4.8, 17.10.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is xwiki-platform-oldcore affected?
Yes, org.xwiki.platform:xwiki-platform-oldcore is affected in releases prior to 17.4.8, 17.10.1. Upgrade your dependency to 17.4.8, 17.10.1 or later.
Is xwiki-platform-legacy-oldcore affected?
Yes, org.xwiki.platform:xwiki-platform-legacy-oldcore is affected in releases prior to 17.4.8, 17.10.1. Upgrade your dependency to 17.4.8, 17.10.1 or later.
What CWE is associated with CVE-2026-33229?
CVE-2026-33229 is classified under CWE-862: Missing Authorization (The product does not perform an authorization check when an actor attempts to access a resource or perform an action.).
How can I check Maven dependencies for CVE-2026-33229?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.xwiki.platform'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-h259-74h5-4rh9",
  "modified" : "2026-04-08T19:26:25Z",
  "published" : "2026-04-08T15:00:17Z",
  "aliases" : [ "CVE-2026-33229" ],
  "summary" : "XWiki vulnerable to remote code execution with script right through unprotected Velocity scripting API",
  "details" : "### Impact\nAn improperly protected scripting API allows any user with script right to bypass the sandboxing of the Velocity scripting API and execute, e.g., arbitrary Python scripts, allowing full access to the XWiki instance and thereby compromising the confidentiality, integrity and availability of the whole instance. Note that script right already constitutes a high level of access that we don't recommend giving to untrusted users.\n\n### Patches\nThe vulnerability has been patched in XWiki 17.4.8 and 17.10.1 by requiring programming right to access the affected scripting API.\n\n### Workarounds\nWe're not aware of any workarounds except for being careful whom you grant script right.\n\n### Attribution\nWe thank Youssef Azefzaf for discovering and reporting this vulnerability.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.xwiki.platform:xwiki-platform-oldcore"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "17.0.0-rc-1"
      }, {
        "fixed" : "17.4.8"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
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    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "17.5.0-rc-1"
      }, {
        "fixed" : "17.10.1"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.xwiki.platform:xwiki-platform-legacy-oldcore"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "17.0.0-rc-1"
      }, {
        "fixed" : "17.4.8"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.xwiki.platform:xwiki-platform-legacy-oldcore"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "17.5.0-rc-1"
      }, {
        "fixed" : "17.10.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-h259-74h5-4rh9"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-33229"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/xwiki/xwiki-platform/commit/9fe84da66184c05953df9466cf3a4acd15a46e63"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/xwiki/xwiki-platform"
  }, {
    "type" : "WEB",
    "url" : "https://jira.xwiki.org/browse/XWIKI-23698"
  }, {
    "type" : "WEB",
    "url" : "https://jira.xwiki.org/browse/XWIKI-23702"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-862" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-04-08T15:00:17Z",
    "nvd_published_at" : "2026-04-08T16:16:23Z"
  }
}