This security advisory fixes 4 separate vulnerabilities in eZ Publish Legacy, and we recommend that you install it as soon as possible if you are using Legacy by itself or via the LegacyBridge.
First, it increases the randomness, and thus the security, of the pseudo-random bytes used to generate a hash for the "forgot password" feature. This protects accounts against being taken over through attacks trying to predict the hash. If the increased randomness is not available in your PHP installation, it will now log a warning.
Second, it improves security of the information collector feature, by ensuring no collection emails will be sent from invalid manipulated forms.
Third, it stops the possible leaking of the names of content objects that should not be readable for certain users, on installations where these users can create or edit XML text.
Fourth, it protects against cross-site scripting (XSS) in the Matrix data type, on installations where users are allowed to edit content classes / content types.
We recommend that you install the security update as soon as possible.
To install, use Composer to update to one of the "Resolving versions" mentioned above, or apply these patches manually: https://github.com/ezsystems/ezpublish-legacy/commit/917711eb7ffe2b52a3e9fe12505f6810a63696f7 https://github.com/ezsystems/ezpublish-legacy/commit/6db0e6b7739481f27d954548388bd3f0ed2c6fdd https://github.com/ezsystems/ezpublish-legacy/commit/efcd2b61b15eaaf74e0ff28d6c723cf28e655dab https://github.com/ezsystems/ezpublish-legacy/commit/f9ffaf590b63b4f552142cfd4441afbbfb3f19b1
| Software | From | Fixed in |
|---|---|---|
ezsystems / ezpublish-legacy
|
2011.0.0 | 2017.12.2.1 |
ezsystems / ezpublish-legacy
|
5.4.0 | 5.4.11.3 |
ezsystems / ezpublish-legacy
|
5.3.0 | 5.3.12.3 |
A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.
CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.
A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.
Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.
Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.
SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.