OpenSignLabs OpenSign up to 2.37.0 Parse Cloud Function updatecontacttour resource injection

Summaryinfo

A vulnerability, which was classified as critical, was found in OpenSignLabs OpenSign up to 2.37.0. The impacted element is the function updatecontacttour of the component Parse Cloud Function. Executing a manipulation can lead to resource injection. The identification of this vulnerability is CVE-2026-72545. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as critical was found in OpenSignLabs OpenSign up to 2.37.0. This vulnerability affects the function updatecontacttour of the component Parse Cloud Function. The manipulation with an unknown input leads to a resource injection vulnerability. The CWE definition for the vulnerability is CWE-99. The product receives input from an upstream component, but it does not restrict or incorrectly restricts the input before it is used as an identifier for a resource that may be outside the intended sphere of control. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability was named CVE-2026-72545 since 08/10/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 08/11/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• OpenSignLabs

Name

• OpenSign

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11
• 2.12
• 2.13
• 2.14
• 2.15
• 2.16
• 2.17
• 2.18
• 2.19
• 2.20
• 2.21
• 2.22
• 2.23
• 2.24
• 2.25
• 2.26
• 2.27
• 2.28
• 2.29
• 2.30
• 2.31
• 2.32
• 2.33
• 2.34
• 2.35
• 2.36
• 2.37.0

CPE 2.3info

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• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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