CVE-2026-72545
High
Description
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.
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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