CVE-2024-21650: XWiki Remote Code Execution vulnerability via user registration
First published: Mon Jan 08 2024(Updated: )
### Impact XWiki is vulnerable to a remote code execution (RCE) attack through its user registration feature. This issue allows an attacker to execute arbitrary code by crafting malicious payloads in the "first name" or "last name" fields during user registration. This impacts all installations that have user registration enabled for guests. To reproduce, register with any username and password and the following payload as "first name": `]]{{/html}}{{async}}{{groovy}}services.logging.getLogger("attacker").error("Attack succeeded){{/groovy}}{{/async}}`. In the following page that confirms the success of the registration, the full first name should be displayed, linking to the created user. If the formatting is broken and a log message with content "ERROR attacker - Attack succeeded!" is logged, the attack succeeded. ### Patches This vulnerability has been patched in XWiki 14.10.17, 15.5.3 and 15.8 RC1. ### Workarounds In the administration of your wiki, under "Users & Rights" > "Registration" set the "Registration Successful Message" to the following code: ```velocity #set($message = $services.localization.render('core.register.successful', 'xwiki/2.1', ['USERLINK', $userName])) #set($userLink = $xwiki.getUserName("$userSpace$userName")) {{info}}$message.replace('USERLINK', "{{html clean=false}}$userLink{{/html}}"){{/info}} ``` ### References * https://jira.xwiki.org/browse/XWIKI-21173 * https://github.com/xwiki/xwiki-platform/commit/b290bfd573c6f7db6cc15a88dd4111d9fcad0d31
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| maven/org.xwiki.platform:xwiki-platform-administration-ui | >=15.6-rc-1<15.8-rc-1 | 15.8-rc-1 |
| maven/org.xwiki.platform:xwiki-platform-administration-ui | >=15.0-rc-1<15.5.3 | 15.5.3 |
| maven/org.xwiki.platform:xwiki-platform-administration-ui | >=2.2<14.10.17 | 14.10.17 |
| Xwiki | <14.10.17 | |
| Xwiki | >=15.0<15.5.3 | |
| Xwiki | >=15.6<=15.7 |
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Reference Links
- https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-rj7p-xjv7-7229
- https://github.com/xwiki/xwiki-platform/commit/b290bfd573c6f7db6cc15a88dd4111d9fcad0d31
- https://github.com/xwiki/xwiki-platform/commit/cdf5be8c20b6b6fe6b9b56a6557561007859655f
- https://github.com/xwiki/xwiki-platform/commit/ec608f303913f5e8af061f2a98506f49d69be60f
- https://jira.xwiki.org/browse/XWIKI-21173
- https://nvd.nist.gov/vuln/detail/CVE-2024-21650
- https://github.com/advisories/GHSA-rj7p-xjv7-7229 (Advisory)
Frequently Asked Questions
What is the severity of CVE-2024-21650?
CVE-2024-21650 is classified as a critical vulnerability due to its potential for remote code execution.
How do I fix CVE-2024-21650?
To fix CVE-2024-21650, upgrade to XWiki version 15.8-rc-1 or later, or apply the provided patches.
Which XWiki versions are affected by CVE-2024-21650?
CVE-2024-21650 affects all XWiki versions prior to 15.8-rc-1, including versions between 15.0-rc-1 and 15.5.3.
Can CVE-2024-21650 be exploited remotely?
Yes, CVE-2024-21650 can be exploited remotely by attackers through the user registration feature.
What kind of attack does CVE-2024-21650 facilitate?
CVE-2024-21650 facilitates remote code execution attacks by allowing arbitrary code to be executed through crafted user input.
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