CVE-2026-1203 Details
Description
A weakness has been identified in CRMEB up to 5.6.3. The impacted element is the function remoteRegister of the file crmeb/app/services/user/LoginServices.php of the component JSON Token Handler. Executing a manipulation of the argument uid can lead to improper authentication. The attack may be performed from remote. The attack requires a high level of complexity. The exploitability is regarded as difficult. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
A vulnerability allowing improper authentication has been identified in CRMEB versions through 5.6.3. The issue arises in the remoteRegister function within the LoginServices.php file, part of the JSON Token Handler component. The vulnerability allows attackers to manipulate the uid argument in base64-encoded JSON tokens, bypassing authentication checks. This flaw can be exploited remotely and has been publicly disclosed, with an available exploit.
Users are advised to disable the remote_register feature and implement proper JWT verification by decoding tokens with signature validation, using the application's secret key.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jan 20, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/foeCat/CVE/blob/main/CRMEB/jwt_auth_bypass/remote_register_jwt_bypass.md | [email protected] | ExploitMitigationThird Party Advisory |
| https://vuldb.com/?ctiid.341789 | [email protected] | Permissions RequiredVDB Entry |
| https://vuldb.com/?id.341789 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/?submit.735349 | [email protected] | Third Party AdvisoryVDB Entry |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-287 | Improper Authentication | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| crmeb crmeb | <= 5.6.3 |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 29, 2026 | Data Remediation | [email protected] |
| Jan 29, 2026 | Initial Analysis | [email protected] |
| Jan 20, 2026 | New CVE Received | [email protected] |