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CVE-2023-3550
Good to know:

Date: September 25, 2023
Mediawiki v1.40.0 does not validate namespaces used in XML files. Therefore, if the instance administrator allows XML file uploads, a remote attacker with a low-privileged user account can use this exploit to become an administrator by sending a malicious link to the instance administrator.
Language: PHP
Severity Score
Related Resources (7)
Severity Score
Weakness Type (CWE)
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-79Top Fix

Upgrade Version
Upgrade to version mediawiki/core - dev-wmf/1.38.0-wmf.1;mediawiki/core - dev-REL1_40;mediawiki/core - dev-wmf/1.39.0-wmf.10
CVSS v3.1
Base Score: |
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Attack Vector (AV): | NETWORK |
Attack Complexity (AC): | LOW |
Privileges Required (PR): | LOW |
User Interaction (UI): | REQUIRED |
Scope (S): | UNCHANGED |
Confidentiality (C): | HIGH |
Integrity (I): | HIGH |
Availability (A): | NONE |