CVE-2024-29217 in Answer
Summary
by MITRE • 04/21/2024
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Apache Answer.This issue affects Apache Answer: before 1.3.0. XSS attack when user changes personal website. A logged-in user, when modifying their personal website, can input malicious code in the website to create such an attack. Users are recommended to upgrade to version [1.3.0], which fixes the issue.
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Analysis
by VulDB Data Team • 06/30/2025
The CVE-2024-29217 vulnerability represents a critical cross-site scripting flaw in Apache Answer, a popular open-source question and answer platform. This vulnerability falls under the CWE-79 category, which specifically addresses improper neutralization of input during web page generation. The flaw manifests when users modify their personal website information within the application's user profile settings, creating an environment where malicious code can be injected and subsequently executed in the context of other users' browsers. The vulnerability is particularly concerning as it requires no special privileges beyond having a valid user account, making it accessible to any authenticated user within the system.
The technical implementation of this XSS vulnerability stems from insufficient input validation and output encoding mechanisms within Apache Answer's website field processing. When users enter website URLs or other web-related information in their profiles, the application fails to properly sanitize or escape the input before rendering it in web pages. This allows attackers to inject malicious scripts that execute in the browsers of other users who view the compromised profile information. The vulnerability is classified as a reflected XSS attack since the malicious input is processed and reflected back to users through the application's web interface without proper sanitization. Attackers can leverage this weakness to steal session cookies, perform unauthorized actions on behalf of victims, or redirect users to malicious websites.
The operational impact of this vulnerability extends beyond simple script execution, potentially enabling sophisticated attack vectors that could compromise entire user sessions and data integrity. An attacker with access to a victim's account could craft malicious website entries that would execute in the context of other users' browsers, leading to session hijacking, data theft, or privilege escalation within the application. The vulnerability affects all versions prior to 1.3.0, leaving numerous installations exposed to potential exploitation. Users who have not upgraded to the patched version remain at risk of having their personal information compromised and potentially facing unauthorized access to their account functionalities. The attack surface is particularly broad since profile information is frequently accessed and displayed throughout the application's user interface, providing multiple opportunities for exploitation.
The recommended mitigation strategy involves immediate upgrading to Apache Answer version 1.3.0 or later, which includes proper input sanitization and output encoding mechanisms to prevent XSS attacks. Organizations should also implement additional security measures such as content security policies to further limit the impact of potential XSS exploitation. The vulnerability aligns with ATT&CK technique T1531, which involves the use of malicious scripts to compromise systems, and demonstrates the importance of proper input validation as outlined in OWASP Top 10 A03:2021. System administrators should conduct thorough security assessments of their deployed instances and ensure all users are aware of the vulnerability's implications. The fix implemented in version 1.3.0 likely includes proper HTML escaping of user input, input validation mechanisms, and potentially additional security headers to prevent script execution in the application's rendering pipeline.