The vulnerability identified as CVE-2025-23891 is characterized as an improper neutralization of input during web page generation, specifically leading to a Cross-site Scripting (XSS) vulnerability. This issue affects the Yet Another Countdown plugin, versions up to 1.0.1. The vulnerability allows attackers to manipulate the Document Object Model (DOM), potentially leading to unauthorized actions executed in the context of the affected user.
With a CVSS score of 6.5, this vulnerability is classified as medium severity. Organizations must take the potential impact seriously as it presents risks that can compromise user data and application integrity. Although the exploitation status is deferred, the existence of this vulnerability necessitates immediate attention.
Risk to organizations includes the possibility of attackers leveraging this XSS vulnerability to execute malicious scripts in users' browsers. This could allow for data theft, session hijacking, or other malicious activities. Organizations should prioritize patching immediately.
As of now, there are no known public exploits available for this vulnerability, but organizations are advised to remain vigilant and apply necessary updates as soon as they become available.
Vulnerability Details
The CVE-2025-23891 vulnerability allows for DOM-based XSS in the Vincent Loy Yet Another Countdown plugin, impacting all versions up to 1.0.1. The underlying weakness is classified under CWE-79, indicative of improper neutralization of input. The official description highlights how user interaction is required to trigger this vulnerability, which can cause significant confidentiality, integrity, and availability impacts.
The CVSS v3.1 vector string for this vulnerability is CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L, reflecting the attack vector as network-based, with low complexity and requiring low privileges. The potential impacts on confidentiality, integrity, and availability are rated as low.
Technical Analysis
Root cause analysis indicates that the vulnerability arises from improper input handling during web page generation. Attackers may exploit this by injecting malicious scripts into pages viewed by other users. The attack vector is through the network, and due to low attack complexity, it can be executed by individuals with low privileges, provided they are able to interact with the affected web application.
Attack complexity is considered low, as attackers do not require advanced skills to exploit this vulnerability. User interaction is required, meaning that a successful exploitation relies on the target user to engage with the malicious content.
In terms of impact, the vulnerability affects confidentiality, integrity, and availability, all rated as low. Confidentiality could be compromised if sensitive information is exposed through the malicious scripts. Integrity could be affected by unauthorized modifications to the content displayed to users, and availability could be impacted if the exploit leads to application downtime.
Risk & Impact Analysis
The real-world deployment risk associated with this vulnerability is significant, especially for organizations using the affected Yet Another Countdown plugin without necessary patches. Attackers could exploit this vulnerability to execute scripts in the context of other users, leading to data theft or unauthorized actions. The blast radius is heightened in environments where users frequently interact with the web application.
Given the medium CVSS score and the fact that it is not currently listed in the KEV database, organizations should assess the urgency based on their specific environment and the presence of this plugin. Organizations should address in priority patch cycle.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerability affects all versions of the Yet Another Countdown plugin up to 1.0.1. Organizations using this plugin are strongly advised to upgrade to the latest version to mitigate this risk.
Mitigation & Remediation
Organizations should apply patches as soon as they are available. Additionally, implementing security controls such as content security policies can help mitigate the risk of XSS attacks. For a comprehensive approach, consider utilizing penetration testing to validate the effectiveness of security measures.
Detection Guidance
To detect potential exploitation of this vulnerability, organizations should monitor logs for unusual script executions and validate user inputs. Behavioral anomalies in user sessions may indicate attempts to exploit XSS vulnerabilities.
AppSecure Threat Intelligence Insight
CVE-2025-23891 represents a common yet critical issue faced by many web applications. This vulnerability highlights the necessity for developers to implement proper input validation and output encoding to prevent XSS vulnerabilities. Security teams should consider reviewing their application security practices.
For organizations looking to enhance their security posture, resources such as the vulnerability management program and effective penetration testing methodology can provide valuable insights into preventing similar vulnerabilities.
Overall, maintaining a proactive approach towards application security is essential in the evolving landscape of web vulnerabilities.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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