CVE-2026-72543

HIGH 7.5

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 retrieve any contact record via the getcontact Parse cloud function. The function executes with useMasterKey and performs no authentication or authorization checks before returning the requested contact object. An attacker can enumerate and read all contact records including personally identifiable information 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:H/I:N/A:N

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

OpenSignLabs / OpenSign

0 ≤ 2.37.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/OpenSignLabs/OpenSign

Credits

Bobur Abdugafforov (Mahadsec)