Ribblr iOS App EUVD-2025-209576

Q: What is the CVSS score of EUVD-2025-209576?

EUVD-2025-209576 has a CVSS 4.0 base score of 5.3 (Medium). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.0%.

| CVE-2025-15626 MEDIUM

Authorization Bypass Through User-Controlled Key (CWE-639)

2026-04-27 NCSC-FI

Authentication Bypass Apple Crotchet And Knitting

5.3

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

5.3 MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:X/RE:X/U:X

vuln.today AI

4.3 MEDIUM

AV:N for network API exploitation; PR:L because authentication is required; C:L for limited cross-user read access; no integrity or availability impact confirmed.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from NVD.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Lifecycle Timeline

Analysis Generated

Jul 24, 2026 - 02:00 vuln.today

CVSS changed

Apr 27, 2026 - 14:22 NVD

5.3 (MEDIUM)

EUVD ID Assigned

Apr 27, 2026 - 13:30 euvd

EUVD-2025-209576

CVE Published

Apr 27, 2026 - 12:47 nvd

MEDIUM 5.3

DescriptionCVE.org

Authenticated user can bypass authorization in Ribblr - Crochet & Knitting iOS application

AnalysisAI

Authorization bypass in Ribblr Crochet & Knitting iOS version 2.5 allows authenticated users to access resources belonging to other users by manipulating user-controlled object identifiers, a class of flaw defined by CWE-639 (IDOR). The vulnerability is network-exploitable with low privilege and no user interaction required, but is constrained to confidentiality impact only - no integrity or availability exposure. No active exploitation has been confirmed (CISA KEV absent), and the EPSS score of 0.04% at the 11th percentile reflects minimal real-world exploitation probability at time of analysis.

Technical ContextAI

CWE-639 (Authorization Bypass Through User-Controlled Key) describes the Insecure Direct Object Reference (IDOR) vulnerability class, where an application exposes internal object identifiers - such as user IDs, pattern IDs, or resource tokens - in API calls without verifying that the requesting authenticated user is actually authorized to access the referenced object. In a mobile application context, this is commonly exploited by intercepting API traffic via a proxy (e.g., Burp Suite or mitmproxy) and substituting another user's identifier in place of one's own. The CPE string cpe:2.3:a:ribblr:crotchet_and_knitting:*:*:*:*:*:*:*:* identifies the Ribblr application as the affected product, and the CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N) confirms the flaw is network-exploitable at low attack complexity by authenticated users, with limited confidentiality impact and no integrity or availability exposure.

RemediationAI

No vendor-released patch or fixed version has been independently confirmed at time of analysis. The sole reference in available intelligence is the Ribblr vendor homepage (https://ribblr.com/), with no linked security advisory or changelog entry identifying a remediated release. Users should monitor the Ribblr listing in the Apple App Store for application updates and check the vendor website for any published security notices addressing CVE-2025-15626. As a compensating control, users who are concerned about unauthorized access to their account data should limit the sensitivity of information stored in their Ribblr profile and pattern library until a fix is confirmed. Organizations managing iOS devices via MDM should evaluate whether Ribblr is deployed in environments where cross-user data exposure would violate applicable data protection requirements.