User Session Synchronizer <= 1.4.0 - Unauthenticated Authentication Bypass to Account Takeover via 'ussync-key', 'ussync-token', and 'ussync-ref' Parameters
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| rafasashi | User Session Synchronizer | unaffected |
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No data.
No data.
| Vendor | Product | Versions | ||||||||
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| Rafasashi | User Session Synchronizer |
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| Wordpress | Wordpress |
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No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.585% probability within 30 days)
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| Metrics |
ssvc
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| First Time appeared |
Rafasashi
Rafasashi user Session Synchronizer Wordpress Wordpress wordpress |
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| Vendors & Products |
Rafasashi
Rafasashi user Session Synchronizer Wordpress Wordpress wordpress |
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| Description | The User Session Synchronizer plugin for WordPress is vulnerable to Authentication Bypass leading to Account Takeover in all versions up to, and including, 1.4.0. The `synchronize_session()` function, hooked on `init` and therefore executed on every request, performs no nonce, capability, or shared-secret validation against the attacker-supplied `ussync-key`, `ussync-token`, and `ussync-ref` parameters; when `ussync-key` references an unregistered slot, `get_option()` returns `false` for both the secret key and the domain list, causing the AES-256-CBC encryption key to degrade to the fully predictable `md5('')` and the referer allowlist to collapse to an empty-string match, while the AES IV is unconditionally hard-coded as `md5('another-secret')`. This makes it possible for unauthenticated attackers to supply a crafted request encrypting any known or guessable user email address in the `ussync-ref` parameter, causing the handler to call `wp_set_auth_cookie()` for the matched user and granting full authentication as that user — including administrators — with no prior knowledge of site secrets. | |
| Title | User Session Synchronizer <= 1.4.0 - Unauthenticated Authentication Bypass to Account Takeover via 'ussync-key', 'ussync-token', and 'ussync-ref' Parameters | |
| Weaknesses | CWE-287 | |
| References |
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| Metrics |
cvssV3_1
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