CVE-2025-23689 in Blogger Image Import Plugin
Summary
by MITRE • 01/16/2025
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Poco Blogger Image Import allows Stored XSS.This issue affects Blogger Image Import: from 2.1 through n/a.
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Analysis
by VulDB Data Team • 02/10/2025
The CVE-2025-23689 vulnerability represents a critical cross-site scripting flaw in the Poco Blogger Image Import plugin that enables stored XSS attacks. This vulnerability occurs during the web page generation process when user input is improperly neutralized, creating an attack vector that allows malicious scripts to be persistently stored and executed in the context of other users' browsers. The affected version range spans from 2.1 through the latest available version, indicating a widespread exposure across multiple iterations of the plugin. This type of vulnerability falls under the CWE-79 category of Cross-Site Scripting, which is classified as a fundamental web application security weakness that has been consistently identified as one of the most prevalent and dangerous vulnerabilities in web applications. The ATT&CK framework categorizes this as a code injection technique under the T1566.001 sub-technique, specifically targeting web application vulnerabilities that enable persistent script execution.
The technical implementation of this vulnerability stems from the plugin's failure to properly sanitize or escape user-supplied data during the image import process. When administrators or users import images through the blogger image import functionality, the plugin processes metadata and file information that may contain malicious script code. This unescaped input is then stored in the database and subsequently rendered on web pages without proper output encoding. The stored nature of this XSS vulnerability means that once malicious code is injected, it will execute every time affected pages are loaded by other users, making it particularly dangerous for administrative interfaces where privileged users might be targeted. Attackers can leverage this vulnerability to steal session cookies, perform unauthorized actions on behalf of users, redirect victims to malicious sites, or even establish persistent backdoors within the affected web application environment.
The operational impact of CVE-2025-23689 extends beyond simple script execution, as it can compromise the entire web application and underlying user data. An attacker who successfully exploits this vulnerability can access sensitive information, manipulate content, and potentially escalate privileges within the blogging platform. The vulnerability is particularly concerning for content management systems where administrators frequently import images and may have elevated privileges. The stored nature of the attack means that even if the initial injection point is patched, previously stored malicious payloads continue to execute, creating a persistent threat that can remain undetected for extended periods. This vulnerability directly violates the principle of least privilege and can lead to complete system compromise if the affected application has access to sensitive data or administrative functions.
Mitigation strategies for CVE-2025-23689 should focus on immediate remediation through plugin updates from the vendor, as well as implementing defensive measures to reduce the attack surface. Organizations should ensure that all instances of the Poco Blogger Image Import plugin are updated to versions that properly address the input sanitization flaws. Additionally, implementing Content Security Policy headers can provide an additional layer of protection against script execution, while input validation and output encoding should be enforced at multiple levels within the application architecture. The implementation of proper input sanitization techniques, including the use of HTML entity encoding for user-supplied data, should be mandatory for all web applications processing user input. Security monitoring should be enhanced to detect unusual import activities, and regular security audits should be conducted to identify similar vulnerabilities in other plugins or components. Organizations should also consider implementing web application firewalls and intrusion detection systems that can help identify and block malicious input patterns associated with XSS attacks. The vulnerability demonstrates the critical importance of input validation and output encoding in web application security, aligning with security best practices outlined in the OWASP Top Ten and NIST cybersecurity frameworks.