Cyber Resilience

CVE-2025-49147

Umbraco Cms 10.0.0 – 10.8.11

Published
24 June 2025
Modified
17 June 2026
Patch / advisory
View advisory
CVSS Score v3.1 5.3
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS Score 0.0029 21th percentile
Risk Priority 43 floored blend · peak EPSS

Summary

CVE-2025-49147 is a medium-severity Exposure of Sensitive System Information to an Unauthorized Control Sphere (CWE-497) vulnerability in Umbraco Umbraco Cms. Its CVSS base score is 5.3 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique System Information Discovery (T1082); ranked at the 21th 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 AC-3 (Access Enforcement) 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, a free and open source .NET content management system, has a vulnerability in versions 10.0.0 through 10.8.10 and 13.0.0 through 13.9.1. Via a request to an anonymously authenticated endpoint it's possible to retrieve information about the configured password requirements.…

more

The information available is limited but would perhaps give some additional detail useful for someone attempting to brute force derive a user's password. This information was not exposed in Umbraco 7 or 8, nor in 14 or higher versions. The vulnerability is patched in versions 10.8.11 and 13.9.2.

CWE(s)
CWE-497

Related Threats

MITRE ATT&CK Enterprise Techniques

T1082 System Information Discovery Discovery
An adversary may attempt to get detailed information about the operating system and hardware, including version, patches, hotfixes, service packs, and architecture.
attack.mitre.org →
T1614 System Location Discovery Discovery
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2024-43376Same product: Umbraco Umbraco Cms
CVE-2025-54425Same product: Umbraco Umbraco Cms
CVE-2023-49274Same product: Umbraco Umbraco Cms
CVE-2025-24011Same product: Umbraco Umbraco Cms
CVE-2023-49278Same product: Umbraco Umbraco Cms
CVE-2025-66625Same 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

Affected Assets

umbraco
umbraco cms
10.0.0 — 10.8.11 · 13.0.0 — 13.9.2

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)
  • 5 hardening rules · 4 OS baselines
Validate
Prove the fix (OWASP ASVS)
  • V14.1.2

Mitigating Controls (NIST 800-53 r5) AI

AC-3 Access Enforcement good match

Enforces approved authorizations for logical access, directly stopping unauthorized actors from reaching sensitive system information.

AC-4 Information Flow Enforcement good match

Enforces information flow policies that block sensitive system data from crossing into unauthorized control spheres.

AC-6 Least Privilege good match

Limits privileges so that only the minimum necessary access is granted, reducing the chance of exposing system-level details.

SC-7 Boundary Protection partial match

Controls communications at external and key internal boundaries to keep sensitive system information inside authorized spheres.

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.AA-05 mostly match
prevents

Enforcing least-privilege access permissions directly prevents unauthorized actors from reaching sensitive system information.

PR.IR-01 mostly match
prevents

Protecting environments from unauthorized logical access stops exposure of internal system details to outsiders.

PR.PS-06 partial match
prevents

Secure-development practices reduce the chance of code paths that leak sensitive system information.

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.7.3 Securing offices, rooms and facilities none match
none

Keeping internal maps, directories, and signage from public view prevents disclosure of system or facility details that could aid reconnaissance or targeted attacks.

Hardening callouts derived

Configuration rules from DISA STIG baselines that bear on weaknesses of the type cited by this CVE. Each rule is shown with the relationship its mapping actually records, against the CWE it was authored against. Derived via CVE→CWE over `controls_xwalks` (authoritative rows only; rows rated `none` are excluded).

Oracle Linux 8 (2 rules)
  • V-248551 A sticky bit must be set on all OL 8 public directories to prevent unauthorized and unintended information transferred via shared system resources. prevents CWE-497
  • V-248580 OL 8 must prevent kernel profiling by unprivileged users. prevents CWE-497
RHEL 8 (1 rule)
  • V-230270 RHEL 8 must prevent kernel profiling by unprivileged users. prevents CWE-497
Ubuntu 22.04 (1 rule)
  • V-260470 Ubuntu 22.04 LTS, when booted, must require authentication upon booting into single-user and maintenance modes. prevents CWE-497
Ubuntu 24.04 (1 rule)
  • V-270675 Ubuntu 24.04 LTS when booted must require authentication upon booting into single-user and maintenance modes. prevents CWE-497

References