Cyber Resilience

CVE-2024-34071

Open Redirect in Umbraco Cms 8.18.5 – 8.18.14

Open Redirect
Published
21 May 2024
Modified
12 February 2025
Patch / advisory
View advisory
CVSS Score v3.1 6.1
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS Score 0.0037 30th percentile
Risk Priority 47 floored blend · peak EPSS

Summary

CVE-2024-34071 is a medium-severity Open Redirect (CWE-601) vulnerability in Umbraco Umbraco Cms. Its CVSS base score is 6.1 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Phishing (T1566); ranked at the 30th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SI-10 (Information Input Validation) and AC-4 (Information Flow Enforcement) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

A01:2025 Broken Access Control

EU & UK References

Vulnerability Data

Umbraco is an ASP.NET CMS used by more than 730.000 websites. Umbraco has an endpoint that is vulnerable to open redirects. The endpoint is protected so it requires the user to be signed into backoffice before the vulnerable is exposed.…

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This vulnerability has been patched in version(s) 8.18.14, 10.8.6, 12.3.10 and 13.3.1.

CWE(s)
CWE-601

Related Threats

MITRE ATT&CK Enterprise Techniques

T1566 Phishing Initial Access
Adversaries may send phishing messages to gain access to victim systems.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2026-46616Same product: Umbraco Umbraco Cms
CVE-2025-54425Same product: Umbraco Umbraco Cms
CVE-2024-43376Same product: Umbraco Umbraco Cms
CVE-2023-48313Same product: Umbraco Umbraco Cms
CVE-2023-38694Same product: Umbraco Umbraco Cms
CVE-2024-48926Same product: Umbraco Umbraco Cms
CVE-2023-49089Same product: Umbraco Umbraco Cms
CVE-2024-29035Same product: Umbraco Umbraco Cms
CVE-2026-31833Same product: Umbraco Umbraco Cms
CVE-2025-46736Same product: Umbraco Umbraco Cms

Affected Assets

umbraco
umbraco cms
8.18.5 — 8.18.14 · 10.5.0 — 10.8.6 · 12.0.0 — 12.3.10

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V3.7.2

Mitigating Controls (NIST 800-53 r5) AI

SI-10 Information Input Validation good match

Input validation directly checks and rejects untrusted redirect targets before they are used in a response.

AC-4 Information Flow Enforcement partial match

Information flow enforcement can restrict redirects to only approved/trusted destinations, stopping untrusted user-supplied URLs from being followed.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly require input validation and untrusted-redirect controls that prevent CWE-601.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.23 Web filtering partial match
mitigates

Preventing access to attacker-controlled or malicious sites stops users from being redirected to untrusted locations via open-redirect or phishing links.

References