Cyber Resilience

CVE-2025-32359

Zammad 6.4.0 – 6.4.2

Published
05 April 2025
Modified
15 April 2025
Patch / advisory
View advisory
CVSS Score v3.1 4.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
EPSS Score 0.0028 20th percentile
Risk Priority 39 floored blend · peak EPSS

Summary

CVE-2025-32359 is a medium-severity Client-Side Enforcement of Server-Side Security (CWE-602) vulnerability in Zammad Zammad. Its CVSS base score is 4.8 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 20th 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-25 (Reference Monitor) and AC-3 (Access Enforcement) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

A06:2025 Insecure Design

EU & UK References

Vulnerability Data

In Zammad 6.4.x before 6.4.2, there is client-side enforcement of server-side security. When changing their two factor authentication configuration, users need to re-authenticate with their current password first. However, this change was enforced in Zammad only on the front end…

more

level, and not when using the API directly.

CWE(s)
CWE-602NVD-CWE-Other

Related Threats

MITRE ATT&CK Enterprise Techniques

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2026-34721Same product: Zammad Zammad
CVE-2025-32358Same product: Zammad Zammad
CVE-2024-33668Same product: Zammad Zammad
CVE-2026-34719Same product: Zammad Zammad
CVE-2026-34782Same product: Zammad Zammad
CVE-2024-33667Same product: Zammad Zammad
CVE-2026-34722Same product: Zammad Zammad
CVE-2025-32357Same product: Zammad Zammad
CVE-2023-29868Same product: Zammad Zammad
CVE-2023-31597Same product: Zammad Zammad

Affected Assets

zammad
zammad
6.4.0 — 6.4.2

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)
  • V10.7.1
  • V2.2.2
  • V8.3.1
  • V10.4.1

Mitigating Controls (NIST 800-53 r5) AI

AC-25 Reference Monitor good match

Requires a tamper-proof, always-invoked reference monitor that cannot be bypassed by client-side logic.

AC-3 Access Enforcement good match

Enforces all access decisions on the server according to policy rather than trusting client-supplied enforcement.

AC-4 Information Flow Enforcement good match

Enforces information-flow rules at the server boundary instead of delegating them to the client.

SC-7 Boundary Protection partial match

Monitors and controls all external and key internal interfaces so that server-side policy cannot be off-loaded to clients.

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 prevent design flaws that place server security enforcement on the client.

PR.AA-05 partial match
prevents

Proper policy-based enforcement of authorizations implies server-side controls rather than client-only checks.

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.8.27 Secure system architecture and engineering principles mostly match
prevents

Secure architecture principles discourage client-side trust but do not directly address this weakness.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing can detect client-side enforcement but is not the primary mitigation.

A.8.3 Information access restriction mostly match
prevents

Information access restriction is undermined when the client is trusted to enforce it.

A.8.25 Secure development life cycle partial match
prevents

Secure development lifecycle mandates server-side validation and prevents reliance on client enforcement.

A.8.26 Application security requirements partial match
prevents

Application security requirements explicitly call for server-side enforcement of security mechanisms.

A.8.28 Secure coding partial match
prevents

Secure coding standards require server-side checks and reject client-only enforcement.

References