CVE-2025-31696 in RapiDoc OAS Field Formatter
Summary
by MITRE • 04/01/2025
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Drupal RapiDoc OAS Field Formatter allows Cross-Site Scripting (XSS).This issue affects RapiDoc OAS Field Formatter: from 0.0.0 before 1.0.1.
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Analysis
by VulDB Data Team • 09/02/2025
The CVE-2025-31696 vulnerability represents a critical cross-site scripting flaw within the Drupal RapiDoc OAS Field Formatter module, which operates under the broader category of web application security weaknesses. This vulnerability specifically manifests during the web page generation process where input data fails to be properly sanitized or neutralized before being rendered in HTML contexts. The flaw exists in the module's handling of user-supplied data that gets incorporated into web pages without adequate validation or encoding mechanisms, creating an exploitable condition for malicious actors to inject harmful scripts.
The technical implementation of this vulnerability stems from insufficient input validation and output encoding practices within the RapiDoc OAS Field Formatter module. When Drupal processes API documentation generated through this field formatter, it fails to properly escape or sanitize special characters that could be interpreted as HTML or JavaScript code. This improper neutralization creates a direct pathway for attackers to inject malicious payloads that execute in the context of other users' browsers. The vulnerability affects all versions from 0.0.0 up to but not including version 1.0.1, indicating that the module's developers identified and addressed the issue in their subsequent release.
From an operational perspective, this XSS vulnerability poses significant risks to Drupal installations utilizing the RapiDoc OAS Field Formatter module. Attackers could exploit this weakness to steal session cookies, perform unauthorized actions on behalf of users, redirect victims to malicious websites, or even escalate privileges within the application. The impact extends beyond simple data theft as the vulnerability could enable complete compromise of user sessions and potentially lead to broader system infiltration. Given that Drupal is widely used for content management and web applications, the potential attack surface is substantial, particularly in environments where multiple users interact with API documentation interfaces.
The vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws in web applications, and maps to ATT&CK technique T1566.001 for initial access through malicious web content. Organizations running affected Drupal versions should prioritize immediate patching to remediate this vulnerability. The recommended mitigation involves upgrading to version 1.0.1 or later where the input sanitization and output encoding mechanisms have been properly implemented. Additionally, administrators should implement additional security measures such as content security policies, regular security audits, and input validation monitoring to reduce the risk of exploitation. Security teams should also consider implementing web application firewalls and conducting thorough vulnerability assessments to identify any potential secondary impacts from this XSS vulnerability within their specific deployment environments.