CVE-2026-55573
CriticalCVSS 9.8Summary
In e107 CMS prior to 2.3.7, install.php decodes the attacker-controlled previous_steps POST parameter and passes it to unserialize() at file scope and again in the e_install constructor without restricting allowed classes. The installer remains accessible after a normal installation, and a crafted object graph using the bundled GuzzleHttp\Psr7\PumpStream class can flow through paths.hash into site_path, where string coercion invokes an attacker-controlled callable. An unauthenticated attacker who can reach install.php can therefore execute arbitrary PHP functions with the web server process's privileges, leading to full server compromise.
Risk Assessment
The vulnerability allows an unauthenticated attacker to execute arbitrary PHP code in the context of the web server, leading to full server compromise. This poses a critical risk to confidentiality, integrity, and availability.
Recommendation
Immediately update e107 to version 2.3.7 or later. Until patched, remove or block access to install.php.
Other vulnerabilities in e107
See all- CVE-2026-57859High
e107 prior to version 2.3.8 contains a code execution vulnerability in the e_array deserialization handler. An attacker with database write access can store a crafted payload in the user_prefs column, which upon materialization of user preferences is passed to eval(), leading to automatic execution of arbitrary PHP code.
- CVE-2016-10378High
e107 version 2.1.1 allows SQL injection by remote authenticated administrators via the pagelist parameter to e107_admin/menus.php, related to the menuSaveVisibility function.
- CVE-2026-55572Critical
In e107 CMS prior to 2.3.7, the bundled alt_auth plugin's otherdb and e107db authentication backends interpolate the submitted login username directly into SQL in e107_plugins/alt_auth/otherdb_auth.php and e107_plugins/alt_auth/e107db_auth.php. The login() methods execute those strings with PDO::query() before effective sanitization, so an unauthenticated user can inject SQL when alt_auth is installed and either backend is configured with a live external database connection. The injection can expose or modify data available to the configured database account, and query failures can additionally disclose the generated query through the debug-message path.
- CVE-2026-72599Critical
An SQL injection vulnerability in e107 2.4.0 allows unauthenticated remote attackers to execute arbitrary SQL via the news item page ID parameter. The parameter is concatenated without escaping into a SQL WHERE clause.
- CVE-2026-43936Medium
e107 CMS prior to version 2.3.4 allows access to the local environment by specifying a local URL in the "Image/File URL:" field of the "From a remote location" option in the Media Manager on the admin screen. This vulnerability is fixed in version 2.3.4.
- CVE-2026-43935High
In e107 before 2.3.4, a Host Header Injection vulnerability in the password reset page allows attackers to generate password reset links pointing to attacker-controlled domains.
- CVE-2026-43934Medium
e107 is a content management system (CMS). Prior to 2.3.4, a Broken Access Control vulnerability exists in the application, allowing an unauthorized authenticated user to edit comments posted by others. This stems from inadequate server-side access control validation, where the application depends only on a predictable identifier in the request to determine which comment to edit, without confirming the requesting user’s ownership of the comment.
Original NVD description (English source)
e107 is a content management system (CMS). Prior to 2.3.7, install.php decodes the attacker-controlled previous_steps POST parameter and passes it to unserialize() at file scope and again in the e_install constructor without restricting allowed classes. The installer remains accessible after a normal installation, and a crafted object graph using the bundled GuzzleHttp\Psr7\PumpStream class can flow through paths.hash into site_path, where string coercion invokes an attacker-controlled callable. An unauthenticated attacker who can reach install.php can therefore execute arbitrary PHP functions with the web server process's privileges, leading to full server compromise. This issue is fixed in version 2.3.7.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS