A CRITICAL-severity vulnerability identified as CVE-2026-63048 has been published on July 22, 2026 with a CVSS base score of 9.4. This security advisory provides a detailed breakdown of the vulnerability, its potential impact, weakness classification, and actionable steps to protect your systems.
Vulnerability Details
CVE ID: CVE-2026-63048
Severity: CRITICAL
CVSS Score: 9.4
Published: July 22, 2026
Weakness (CWE): CWE-434
| Attack Vector | Network |
| Attack Complexity | Low |
| Privileges Required | Low |
| User Interaction | None |
Technical Description
The Joomla extension Page Builder CK is vulnerable to an authenticated arbitrary file upload, leading to RCE.
Potential Impact
If exploited, this critical-severity vulnerability could allow an attacker to cause significant damage to affected systems. Organizations running affected software should treat this as a priority remediation item.
Recommended Action
No official patch is available yet. Until one is released:
- Monitor the official NVD page and vendor channels for patch announcements.
- Restrict access to the affected system or service where possible.
- Apply network-level mitigations such as firewall rules or WAF policies.
- Enable logging and alerting for anomalous activity related to this vulnerability.
- Review your incident response plan in case of active exploitation.
References
Related Security Advisories
- [CRITICAL] CVE-2026-57827 — CVSS 10.0 (July 11, 2026) — CRITICAL / CVSS 10.0
- [CRITICAL] CVE-2026-57828 — CVSS 9.0 (July 11, 2026) — CRITICAL / CVSS 9.0
- [CRITICAL] CVE-2026-16242 — CVSS 9.4 (July 20, 2026) — CRITICAL / CVSS 9.4
![[CRITICAL] CVE-2024-13784 — CVSS 9.8 (August 16, 2026)](https://atlas-cybersecurity.com/wp-content/plugins/elementor/assets/images/placeholder.png)
