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| Package Name | Ecosystem | Vulnerable Versions | First Patched Version |
|---|---|---|---|
| pimcore/pimcore | composer | < 10.5.20 | 10.5.20 |
The vulnerability arises from improper neutralization of the 'index_key' input in composite indices. The PHP saveAction method processed user-supplied 'index_key' values without sanitization (via preg_replace), enabling stored XSS when rendered. The JavaScript client-side code (class.js) lacked validation for the same field, allowing XSS payloads to bypass client checks. The patch introduced both server-side sanitization and client-side validation, confirming these were the vulnerable points. Both layers were critical: the server-side flaw allowed persistent XSS, while the missing client-side validation facilitated easier exploitation.
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