CVE-2012-2910 in phpThumb
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in SiliSoftware phpThumb() 1.7.11 allow remote attackers to inject arbitrary web script or HTML via the (1) dir parameter to demo/phpThumb.demo.random.php or (2) title parameter to demo/phpThumb.demo.showpic.php.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 04/18/2025
The CVE-2012-2910 vulnerability affects SiliSoftware phpThumb() version 1.7.11 and represents a critical cross-site scripting flaw that enables remote attackers to execute malicious web scripts or HTML code within the context of vulnerable applications. This vulnerability exists due to insufficient input validation and output sanitization mechanisms within the phpThumb library, which is commonly used for generating thumbnails and processing images in web applications. The vulnerability manifests through two distinct attack vectors that target different demo scripts within the software distribution.
The technical implementation of this vulnerability stems from the improper handling of user-supplied input parameters in two specific demo files. The first vector involves the dir parameter in demo/phpThumb.demo.random.php, while the second involves the title parameter in demo/phpThumb.demo.showpic.php. Both parameters receive user input without adequate sanitization or encoding, allowing attackers to inject malicious payloads that get executed when the vulnerable application processes these inputs. This flaw directly maps to CWE-79, which describes Cross-Site Scripting vulnerabilities where untrusted data is incorporated into web pages without proper validation or encoding. The vulnerability's classification aligns with ATT&CK technique T1190, which covers exploits for execution through web applications that leverage XSS flaws to inject malicious code.
The operational impact of this vulnerability extends beyond simple script injection, as it provides attackers with the capability to perform session hijacking, defacement of web pages, data theft, and potentially more severe attacks through the exploitation of user sessions. When an attacker successfully injects malicious code through either parameter, the executed script can access the victim's browser session cookies, enabling unauthorized access to authenticated web applications. The vulnerability is particularly dangerous because it affects demo scripts that are often included in the distribution, making them readily exploitable in environments where these scripts are accessible to unauthorized users. This creates a significant risk for web applications that use phpThumb() for image processing, as the vulnerable components may be present in production environments alongside the vulnerable demo files.
Mitigation strategies for CVE-2012-2910 should focus on immediate remediation through software updates to the latest stable version of phpThumb() where the XSS vulnerabilities have been addressed. Organizations should implement proper input validation and output encoding mechanisms for all user-supplied parameters, particularly in web applications that utilize image processing libraries. The principle of least privilege should be applied by ensuring that demo scripts are not accessible in production environments, and by removing or disabling these scripts from live deployments. Additionally, web application firewalls should be configured to detect and block suspicious input patterns that could indicate XSS attack attempts. Security monitoring should include regular scanning for vulnerable components and ensuring that all third-party libraries are kept up to date with security patches. The vulnerability demonstrates the critical importance of input validation and output encoding practices that align with industry standards and security frameworks such as OWASP Top Ten, which consistently identifies XSS as one of the most prevalent web application security risks.