Drupal CAS Server XML Injection PrivEsc (before 2.0.3, before 2.1.2)
CVE-2026-1554 Published on February 4, 2026

Central Authentication System (CAS) Server - Less critical - XML Element Injection - SA-CONTRIB-2026-007
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.

NVD

Vulnerability Analysis

CVE-2026-1554 is exploitable with network access, and requires small amount of user privileges. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality and integrity, and no impact on availability.

Attack Vector:
NETWORK
Attack Complexity:
HIGH
Privileges Required:
LOW
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
LOW
Integrity Impact:
LOW
Availability Impact:
NONE

Weakness Type

What is an aka Blind XPath Injection Vulnerability?

The software does not properly neutralize special elements that are used in XML, allowing attackers to modify the syntax, content, or commands of the XML before it is processed by an end system. Within XML, special elements could include reserved words or characters such as "<", ">", """, and "&", which could then be used to add new data or modify XML syntax.

CVE-2026-1554 has been classified to as an aka Blind XPath Injection vulnerability or weakness.


Affected Versions

Drupal Central Authentication System (CAS) Server:

Exploit Probability

EPSS
0.04%
Percentile
11.55%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.