What is the CVSS score of CVE-2026-1554?

CVE-2026-1554 has a CVSS 3.1 base score of 4.2 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Central Authentication System Server are affected by CVE-2026-1554?

CVE-2026-1554 presents moderate security risk rated CVSS 4.2. Exploitation could compromise the security of affected deployments.. A patch is available.

Central Authentication System Server CVE-2026-1554

MEDIUM

XML Injection (aka Blind XPath Injection) (CWE-91)

2026-02-04 mlhess@drupal.org

Drupal Privilege Escalation Central Authentication System Server

4.2

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

4.2 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Patch released

Mar 31, 2026 - 21:13 nvd

Patch available

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

CVE Published

Feb 04, 2026 - 21:15 nvd

MEDIUM 4.2

DescriptionCVE.org

XML Injection (aka Blind XPath Injection) vulnerability in Drupal Central Authentication System (CAS) Server allows Privilege Escalation.This issue affects Central Authentication System (CAS) Server: from 0.0.0 before 2.0.3, from 2.1.0 before 2.1.2.

AnalysisAI

Central Authentication System Server versions up to 2.0.3 contains a security vulnerability (CVSS 4.2).

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Vulnerability AssessmentAI

Risk Assessment	CVSS 4.2 (MEDIUM). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An attacker could exploit this vulnerability to compromise the affected system.
Remediation	Monitor vendor advisories for a patch. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. …

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CVE-2026-1554 vulnerability details – vuln.today

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