CVE-2026-72543
High
Description
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductOpenSign
PublishedAug 11, 2026
First seenAug 11, 2026
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| OpenSignLabs OpenSign | v ≤ 2.37.0 | — |
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