Impact By creating a document with a specially crafted title, it is possible to trigger remote code execution in the (Solr-based) search in XWiki. This allows any user who can edit the title of a space (all users by default) to execute any Groovy code in the XWiki installation which compromises the confidentiality, integrity and availability of the whole XWiki installation.

To reproduce, as a user without script nor programming rights, create a document with title {{/html}}{{async}}{{groovy}}println("Hello from Groovy Title!"){{/groovy}}{{/async}} and content Test Document. Using the search UI, search for "Test Document", then deploy the Location facet on the right of the screen, next to the search results. The installation is vulnerable if you see an item such as: Hello from Groovy Title! </a> <div class="itemCount">1</div> </li> </ul> {{/html}}

Patches This has been patched in XWiki 14.10.20, 15.5.4 and 15.10 RC1.

Workarounds Modify the Main.SolrSpaceFacet page following this patch.

References https://jira.xwiki.org/browse/XWIKI-21471 https://github.com/xwiki/xwiki-platform/commit/acba74c149a041345b24dcca52c586f872ba97fb https://github.com/xwiki/xwiki-platform/commit/74e301c481e69eeea674dac7fed6af3614cf08c5

Impact The Solr-based search in XWiki discloses the password hashes of all users to anyone with view right on the respective user profiles. By default, all user profiles are public. To reproduce, it is sufficient to search for propertyvalue:? AND reference:.password and then deselect the "Document" property under "Result type" in the "Refine your search" widget at the right of the search results. If this displays any passwords or password hashes, the installation is vulnerable.

By default, passwords in XWiki are salted and hashed with SHA-512. On XWiki versions affected by CVE-2022-41933, passwords are stored in plain text if they have been set using the password reset feature. This might affect XWiki installations that are using an external authentication mechanism such that passwords aren't stored in the wiki.

This vulnerability also affects any configurations used by extensions that contain passwords like API keys that are viewable for the attacker. Normally, such passwords aren't accessible but this vulnerability would disclose them as plain text.

Patches This has been patched in XWiki 14.10.15, 15.5.2 and 15.7RC1. This vulnerability has been patched as part of patching GHSA-2grh-gr37-2283, the part of the fix that changes the indexing of single properties to use the same code as the main document for getting the property's value fixes this vulnerability.

Workarounds We're not aware of any workarounds apart from upgrading to a fixed version.

References https://github.com/xwiki/xwiki-platform/commit/3e5272f2ef0dff06a8f4db10afd1949b2f9e6eea https://jira.xwiki.org/browse/XWIKI-21208

Impact In XWiki, it is possible to pass a title to the page creation action that isn't displayed at first but then executed in the second step. This can be used by an attacker to trick a victim to execute code, allowing script execution if the victim has script right or remote code execution including full access to the XWiki instance if the victim has programming right.

For the attack to work, the attacker needs to convince the victim to visit a link like <xwiki-host>/xwiki/bin/create/NonExistingSpace/WebHome?title=$services.logging.getLogger(%22foo%22).error(%22Script%20executed!%22) where <xwiki-host> is the URL of the Wiki installation and to then click on the "Create" button on that page. The page looks like a regular XWiki page that the victim would also see when clicking the button to create a page that doesn't exist yet, the malicious code is not displayed anywhere on that page. After clicking the "Create" button, the malicious title would be displayed but at this point, the code has already been executed and the attacker could use this code also to hide the attack, e.g., by redirecting the victim again to the same page with an innocent title. It thus seems plausible that this attack could work if the attacker can place a fake "create page" button on a page which is possible with edit right.

Patches This has been patched in XWiki 14.10.2 and 15.5RC1 by displaying the title already in the first step such that the victim can notice the attack before continuing.

Workarounds It is possible to manually patch the modified files from the patch in an existing installation. For the JavaScript change, the minified JavaScript file would need to be obtained from a build of XWiki and replaced accordingly.