CVE-2026-72545
OpenSignLabs OpenSign - Insecure Direct Object Reference
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
An insecure direct object reference vulnerability in OpenSignLabs OpenSign through 2.37.0 allows unauthenticated remote attackers to write to any contact record via the updatecontacttour Parse cloud function. The function performs no authentication or authorization before updating the target contact record. An attacker can corrupt or overwrite contact data for any user in the system without credentials.
| CWE | CWE-639 |
| Vendor | opensignlabs |
| Product | opensign |
| Published | Aug 11, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
OpenSignLabs / OpenSign
0 ≤ 2.37.0
Credits
Bobur Abdugafforov (Mahadsec)