CVE-2026-72549: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor in OpenSignLabs OpenSign
An information disclosure vulnerability in OpenSignLabs OpenSign through 2.37.0 allows unauthenticated remote attackers to map any email address or username to its internal user objectId via the getUserId Parse cloud function. The function performs no authentication before resolving and returning the internal identifier. An attacker can use this to enumerate user accounts and target subsequent attacks.
AI Analysis
Technical Summary
CVE-2026-72549 is an information disclosure vulnerability in OpenSignLabs OpenSign (up to version 2.37.0) where the getUserId Parse cloud function lacks authentication controls. This allows unauthenticated remote attackers to map any email address or username to the internal user objectId. The vulnerability arises because the function resolves and returns internal identifiers without verifying the requester's authorization, facilitating user enumeration and potentially aiding targeted attacks.
Potential Impact
The vulnerability exposes internal user object identifiers to unauthenticated attackers, which constitutes a confidentiality breach. While it does not directly impact integrity or availability, the exposure of internal identifiers can assist attackers in crafting further attacks against user accounts. The CVSS score of 5.3 reflects a medium severity impact with low confidentiality impact and no integrity or availability impact.
Mitigation Recommendations
No official patch or remediation is currently available for this vulnerability. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is provided, restrict access to the getUserId function or implement authentication controls to prevent unauthorized access.
CVE-2026-72549: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor in OpenSignLabs OpenSign
Description
An information disclosure vulnerability in OpenSignLabs OpenSign through 2.37.0 allows unauthenticated remote attackers to map any email address or username to its internal user objectId via the getUserId Parse cloud function. The function performs no authentication before resolving and returning the internal identifier. An attacker can use this to enumerate user accounts and target subsequent attacks.
CVSS v3.1
Score 5.3medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-72549 is an information disclosure vulnerability in OpenSignLabs OpenSign (up to version 2.37.0) where the getUserId Parse cloud function lacks authentication controls. This allows unauthenticated remote attackers to map any email address or username to the internal user objectId. The vulnerability arises because the function resolves and returns internal identifiers without verifying the requester's authorization, facilitating user enumeration and potentially aiding targeted attacks.
Potential Impact
The vulnerability exposes internal user object identifiers to unauthenticated attackers, which constitutes a confidentiality breach. While it does not directly impact integrity or availability, the exposure of internal identifiers can assist attackers in crafting further attacks against user accounts. The CVSS score of 5.3 reflects a medium severity impact with low confidentiality impact and no integrity or availability impact.
Mitigation Recommendations
No official patch or remediation is currently available for this vulnerability. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is provided, restrict access to the getUserId function or implement authentication controls to prevent unauthorized access.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- TuranSec
- Date Reserved
- 2026-08-10T10:32:49.081Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a7b0703bf8831d539a0cc32
Added to database: 08/11/2026, 11:26:59 UTC
Last enriched: 08/11/2026, 11:42:59 UTC
Last updated: 08/11/2026, 19:01:02 UTC
Views: 5
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