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Moderate severityNVD Advisory· Published Feb 9, 2022· Updated Apr 23, 2025

Path traversal in xwiki-platform-skin-skinx

CVE-2022-23620

Description

XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. In affected versions AbstractSxExportURLFactoryActionHandler#processSx does not escape anything from SSX document references when serializing it on filesystem, it is possible to for the HTML export process to contain reference elements containing filesystem syntax like "../", "./". or "/" in general. The referenced elements are not properly escaped. This issue has been resolved in version 13.6-rc-1. This issue can be worked around by limiting or disabling document export.

Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
org.xwiki.platform:xwiki-platform-skin-skinxMaven
>= 6.2-rc-1, < 13.613.6

Affected products

1

Patches

1
ab778254fb8f

XWIKI-18819: It's possible to save pretty much anything anywhere by creating and using an SSX/JSX containing "../" in its reference

https://github.com/xwiki/xwiki-platformThomas MortagneJul 7, 2021via ghsa
commit
1 file changed · +7 −11
  • xwiki-platform-core/xwiki-platform-skin/xwiki-platform-skin-skinx/src/main/java/org/xwiki/skinx/internal/AbstractSxExportURLFactoryActionHandler.java+7 −11 modified
    @@ -100,13 +100,13 @@ public URL createURL(String spaces, String name, String queryString, String anch
         XWikiDocument.backupContext(backup, context);
         try {
             sxDocument.setAsContextDoc(context);
-            return processSx(spaceNames, name, queryString, context, exportContext);
+            return processSx(sxDocument.getId(), queryString, context, exportContext);
         } finally {
             XWikiDocument.restoreContext(backup, context);
         }
     }
 
-    private URL processSx(List<String> spaceNames, String name, String queryString, XWikiContext context,
+    private URL processSx(long id, String queryString, XWikiContext context,
         FilesystemExportContext exportContext) throws Exception
     {
         SxSource sxSource = null;
@@ -128,7 +128,7 @@ private URL processSx(List<String> spaceNames, String name, String queryString,
 
         // Write the content to file
         // We need a unique name for that SSX content
-        String targetPath = String.format("%s/%s/%s", getSxPrefix(), StringUtils.join(spaceNames, '/'), name);
+        String targetPath = String.format("%s/%s", getSxPrefix(), id);
         File targetDirectory = new File(exportContext.getExportDir(), targetPath);
         if (!targetDirectory.exists()) {
             targetDirectory.mkdirs();
@@ -146,11 +146,7 @@ private URL processSx(List<String> spaceNames, String name, String queryString,
 
         path.append(getSxPrefix());
         path.append(URL_PATH_SEPARATOR);
-        for (String spaceName : spaceNames) {
-            path.append(encodeURLPart(spaceName));
-            path.append(URL_PATH_SEPARATOR);
-        }
-        path.append(encodeURLPart(name));
+        path.append(id);
         path.append(URL_PATH_SEPARATOR);
         path.append(encodeURLPart(targetLocation.getName()));
 
@@ -161,14 +157,14 @@ protected String getContent(SxSource sxSource, FilesystemExportContext exportCon
     {
         String content;
 
-        // We know we're inside a SX file located at "<S|J>sx/<Space>/<Page>/<s|j>sx<NNN>.<css|js>". Inside this CSS
+        // We know we're inside a SX file located at "<S|J>sx/<id>/<s|j>sx<NNN>.<css|js>". Inside this CSS
         // there can be URLs and we need to ensure that the prefix for these URLs lead to the root of the path, i.e.
-        // 3 levels up ("../../../").
+        // 3 levels up ("../../").
         // To make this happen we reuse the Doc Parent Level from FileSystemExportContext to a fixed value of 3.
         // We also make sure to put back the original value
         int originalDocParentLevel = exportContext.getDocParentLevel();
         try {
-            exportContext.setDocParentLevels(3);
+            exportContext.setDocParentLevels(2);
             content = sxSource.getContent();
         } finally {
             exportContext.setDocParentLevels(originalDocParentLevel);

Vulnerability mechanics

Generated by null/stub on May 9, 2026. Inputs: CWE entries + fix-commit diffs from this CVE's patches. Citations validated against bundle.

References

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