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The vulnerability stemmed from two key issues: 1) The UrlEncryptor's constructor accepted empty secrets and used a flawed IV derivation method (static length, key reuse). 2) The bundle's configuration schema permitted empty secrets. The commit patched both by making secrets required and improving IV generation. The __construct function's pre-patch behavior directly enabled insecure cryptographic parameters, while the Configuration setup allowed these parameters to remain unconfigured.
| Package Name | Ecosystem | Vulnerable Versions | First Patched Version |
|---|---|---|---|
| nzo/url-encryptor-bundle | composer | >= 5.0.0, < 5.0.1 | 5.0.1 |
| nzo/url-encryptor-bundle | composer | >= 4.0.0, < 4.3.2 | 4.3.2 |
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