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CVE-2026-72545

OpenSignLabs OpenSign - Insecure Direct Object Reference

HIGH
7.5
CVSS Score
Published: August 11, 2026 at 11:09 AM UTC
Updated: October 24, 2026 at 03:10 PM UTC
1 product affected across 1 vendorOpenSign

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Severity
HIGH7.5
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

OpenSign· Opensignlabs
90%
0 ≤ v ≤ 2.37.00

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: cverecord
https://github.com/OpenSignLabs/OpenSign

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHTuranSec
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-639

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