CVE-2023-45136
XWiki Platform web templates vulnerable to reflected XSS in the create document form if name validation is enabled
Description
### Impact When document names are validated according to a name strategy (disabled by default), XWiki is vulnerable to a reflected XSS attack in the page creation form. To reproduce, make sure that "Validate names before saving" is enabled in the administration under "Editing" -> "Name strategies" and then open `<xwiki-host>/xwiki/bin/create/Main/%3Cscript%3Ealert%28%27Test%20Test%20Test%20Test%20Test%27%29%3C%2Fscript%3E` where `<xwiki-host>` is the URL of your XWiki installation. This displays an alert if the installation is vulnerable. This allows an attacker to execute arbitrary actions with the rights of the user opening the malicious link. Depending on the rights of the user, this may allow remote code execution and full read and write access to the whole XWiki installation. ### Patches This has been patched in XWiki 14.10.12 and 15.5-RC-1 by adding appropriate escaping. ### Workarounds The vulnerable template file `createinline.vm` is part of XWiki's WAR and can be patched by manually applying the [changes from the fix](https://github.com/xwiki/xwiki-platform/commit/ba56fda175156dd35035f2b8c86cbd8ef1f90c2e#diff-c222148bddebe4ff7629350f4053b618504a4ab172e697938c8fddf7c1fc6bc8).
How to fix CVE-2023-45136
To remediate CVE-2023-45136, upgrade the affected package to a fixed version below.
- —upgrade to 14.10.12 or later
Is CVE-2023-45136 being exploited?
Likely — EPSS is 70.7%, placing CVE-2023-45136 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.
Affected packages (1)
- >= 12.0-rc-1, < 14.10.12