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⚠ WordPress Plugin Arbitrary File Upload

Vulnerability Level: 🔴 Critical
Affected Platform: WordPress
How: A vulnerable plugin allowed attackers to upload malicious PHP files, leading to remote code execution on affected websites.
Impact: Website compromise | Malware deployment | Credential theft | Persistent access
Defence: Update the affected plugin immediately, remove unused plugins, enable a Web Application Firewall (WAF), and monitor uploaded files.
Reference: CVE-2026-XXXX

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⚠ Drupal Access Control Vulnerability

Vulnerability Level: 🔴 Critical
Affected Platform: Drupal CMS
How: An access-control weakness allowed unauthorised users to execute privileged operations under specific conditions.
Impact: Website compromise | Data exposure | Privilege escalation
Defence: Apply Drupal security updates, restrict administrative access, and review audit logs.
Reference: Drupal Security Advisory

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⚠ Jenkins Authentication Bypass

Vulnerability Level: 🟠 High
Affected Platform: Jenkins
How: An authentication weakness could allow attackers to bypass access controls on improperly configured servers.
Impact: CI/CD compromise | Source code exposure | Pipeline manipulation
Defence: Upgrade Jenkins, enforce multi-factor authentication, and audit privileged accounts.
Reference: Jenkins Security Advisory

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⚠ GitLab Privilege Escalation

Vulnerability Level: 🟠 High
Affected Platform: GitLab Community Edition
How: A privilege-escalation flaw allowed authenticated users to gain elevated permissions.
Impact: Repository compromise | Credential exposure | Project manipulation
Defence: Upgrade GitLab immediately and review administrator and service-account permissions.
Reference: GitLab Security Release

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⚠ Nextcloud Authentication Weakness

Vulnerability Level: 🟠 High
Affected Platform: Nextcloud
How: A vulnerability affecting authentication mechanisms could allow unauthorised access under certain deployment scenarios.
Impact: Data exposure | Account compromise | File access
Defence: Apply the latest Nextcloud security update, enable MFA, and review authentication logs.
Reference: Nextcloud Security Advisory

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⚠ Moodle Cross-Site Scripting (XSS)

Vulnerability Level: 🟡 Medium
Affected Platform: Moodle LMS
How: Improper input validation enabled stored cross-site scripting attacks against authenticated users.
Impact: Session hijacking | User impersonation | Information disclosure
Defence: Upgrade Moodle, validate installed plugins, and implement Content Security Policy (CSP).
Reference: Moodle Security Bulletin

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Shilpa Sayura Cyber Defence Research Lab

Editorial Note: Open Source Security Watch is a special edition of Cyber Defence Digest. It highlights significant vulnerabilities affecting widely deployed open-source platforms and should be used as an intelligence starting point alongside official vendor advisories. “`