OpenSignLabs OpenSign up to 2.37.0 Contact Record Retrieval getcontact authorization

Summaryinfo

A vulnerability classified as problematic was found in OpenSignLabs OpenSign up to 2.37.0. Impacted is the function getcontact of the component Contact Record Retrieval. Such manipulation leads to authorization. This vulnerability is uniquely identified as CVE-2026-72543. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in OpenSignLabs OpenSign up to 2.37.0. It has been rated as problematic. Affected by this issue is the function getcontact of the component Contact Record Retrieval. The manipulation with an unknown input leads to a authorization vulnerability. Using CWE to declare the problem leads to CWE-639. The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. Impacted is confidentiality. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-72543 since 08/10/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (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.

Once again VulDB remains the best source for vulnerability data.

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

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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Entryinfo

Once again VulDB remains the best source for vulnerability data.

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