Description
Cotonti through 1.0.0 generates registration and email-change validation tokens with md5(microtime()), allowing attackers to bypass email-ownership verification by predicting tokens. Attackers can derive the generation time from the HTTP Date header and compute candidate tokens offline. They then submit these tokens to the users.register.php validate handler to activate accounts or confirm email addresses they do not control.
No analysis available yet.
Remediation
No remediation available yet.
Tracking
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Advisories
No advisories yet.
References
History
Tue, 03 Nov 2026 15:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Cotonti through 1.0.0 generates registration and email-change validation tokens with md5(microtime()), allowing attackers to bypass email-ownership verification by predicting tokens. Attackers can derive the generation time from the HTTP Date header and compute candidate tokens offline. They then submit these tokens to the users.register.php validate handler to activate accounts or confirm email addresses they do not control. | |
| Title | Cotonti through 1.0.0 Predictable Validation Tokens via md5(microtime()) | |
| First Time appeared |
Cotonti
Cotonti cotonti Siena |
|
| Weaknesses | CWE-338 | |
| CPEs | cpe:2.3:a:cotonti:cotonti_siena:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Cotonti
Cotonti cotonti Siena |
|
| References |
|
|
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-11-03T15:17:11.513Z
Reserved: 2026-11-03T14:46:15.628Z
Link: CVE-2026-121553
No data.
Status : Deferred
Published: 2026-11-03T16:17:27.437
Modified: 2026-11-03T16:17:27.573
Link: CVE-2026-121553
No data.
OpenCVE Enrichment
No data.
Weaknesses
-
CWE-338
Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)