Insecure Direct Object Reference in OpenSign by OpenSignLabs
CVE-2026-72543

7.5HIGH

Key Information:

Vendor

Opensignlabs

Status
Opensign
Vendor
CVE Published:
11 August 2026

What is CVE-2026-72543?

An insecure direct object reference issue in OpenSign by OpenSignLabs allows unauthenticated remote attackers to exploit the system through the getcontact Parse cloud function. This vulnerability permits attackers to retrieve any contact record without the need for authentication or authorization. The system executes with elevated permissions, making it possible for potential attackers to enumerate and access all contact records, which may include sensitive personally identifiable information. Users must take immediate action to secure their data and apply the recommended fixes.

Affected Version(s)

OpenSign 0 <= 2.37.0

References

https://github.com/OpenSignLabs/OpenSign

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Bobur Abdugafforov (Mahadsec)
.