Overview
CVE-2025-13415 is a low-severity Cross-Site Scripting (XSS) vulnerability identified in icret EasyImages versions up to 2.8.6. The vulnerability resides within the SVG Image Handler component of the software. An attacker can exploit this flaw by manipulating the ‘File’ argument in the /app/upload.php script, leading to the injection of malicious scripts into the application. This attack can be initiated remotely.
Technical Details
The vulnerability stems from insufficient sanitization and validation of user-supplied input within the /app/upload.php script when handling SVG image uploads. Specifically, the ‘File’ argument, which carries the uploaded SVG file data, is not properly filtered for potentially malicious JavaScript code. By crafting a malicious SVG file containing embedded JavaScript, an attacker can inject and execute arbitrary scripts within the context of a user’s browser when the image is displayed. The lack of proper input validation allows the injected script to be executed, potentially leading to session hijacking, cookie theft, or defacement of the web page.
CVSS Analysis
The Common Vulnerability Scoring System (CVSS) score for CVE-2025-13415 is 3.5, indicating a Low severity. This score is based on the following factors:
- Attack Vector: Network (AV:N)
- Attack Complexity: Low (AC:L)
- Privileges Required: None (PR:N)
- User Interaction: Required (UI:R)
- Scope: Unchanged (S:U)
- Confidentiality Impact: Low (C:L)
- Integrity Impact: None (I:N)
- Availability Impact: None (A:N)
While the attack vector is network-based and requires no privileges, the necessity for user interaction (clicking on the uploaded, malicious image) lowers the overall severity. The impact is primarily on confidentiality.
Possible Impact
Although classified as low severity, successful exploitation of CVE-2025-13415 can have the following impacts:
- Cookie Theft: An attacker could potentially steal user cookies, gaining unauthorized access to user accounts.
- Session Hijacking: By stealing session cookies, an attacker can impersonate a legitimate user.
- Website Defacement: Though limited, the attacker could potentially modify parts of the webpage visible to the user interacting with the malicious image.
- Phishing Attacks: The injected script could redirect the user to a phishing site, tricking them into entering sensitive information.
Mitigation or Patch Steps
To mitigate the risk posed by CVE-2025-13415, the following steps are recommended:
- Upgrade EasyImages: The most effective solution is to upgrade to a patched version of EasyImages that addresses this vulnerability. Check the icret EasyImages website for updates.
- Input Validation: Implement robust input validation and sanitization on the server-side for all uploaded files, especially SVG images. Specifically, filter out potentially malicious JavaScript code from the ‘File’ argument in
/app/upload.php. - Content Security Policy (CSP): Implement a strong Content Security Policy (CSP) to restrict the sources from which the browser can load resources. This can help prevent the execution of injected scripts.
- Disable SVG Uploads (If Possible): If SVG uploads are not critical to the functionality of the application, consider disabling them altogether.
