CVE-2025-67633 identifies a DOM-based Cross-site Scripting (XSS) vulnerability in the Greenhouse Job Board software developed by brownbagmarketing, affecting versions up to and including 2.7.3. This vulnerability stems from improper neutralization of user-supplied input during the generation of web pages, allowing malicious scripts to be injected and executed within the victim’s browser context. Unlike reflected or stored XSS, DOM-based XSS occurs entirely on the client side, manipulating the Document Object Model after the page loads, which can evade some traditional server-side defenses. The vulnerability requires user interaction, such as clicking a crafted link or visiting a malicious page that interacts with the job board interface. No authentication is required to exploit this issue, increasing its accessibility to attackers. The CVSS 3.1 score of 6.1 reflects a medium severity, with attack vector being network-based, low attack complexity, no privileges required, but user interaction necessary. The impact primarily affects confidentiality and integrity by potentially exposing user session data or enabling actions on behalf of the user, but does not affect system availability. No known exploits have been reported in the wild, and no official patches have been linked yet, indicating that organizations should proactively monitor and apply mitigations. The vulnerability is significant for organizations relying on the Greenhouse Job Board for recruitment, as attackers could leverage this to target job applicants or internal HR staff through malicious payloads embedded in job listings or application forms.

For European organizations, the impact of CVE-2025-67633 can be substantial in terms of data confidentiality and integrity, especially for companies that handle sensitive applicant information or internal HR data through the Greenhouse Job Board platform. Exploitation could lead to theft of session tokens, personal data leakage, or unauthorized actions performed under the guise of legitimate users. This could result in reputational damage, regulatory non-compliance (e.g., GDPR violations), and potential financial losses. Since the vulnerability requires user interaction, phishing or social engineering campaigns could be used to trick users into triggering the exploit. The absence of availability impact means service disruption is unlikely, but the integrity and confidentiality risks remain critical for recruitment processes. Organizations in Europe with high recruitment volumes or those in regulated industries (finance, healthcare, government) are particularly at risk. The lack of known exploits in the wild provides a window for remediation before widespread attacks occur.

1. Immediately review and implement strict input validation and output encoding on all user-supplied data within the Greenhouse Job Board environment, focusing on DOM manipulation points. 2. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the risk of XSS exploitation. 3. Educate HR and recruitment staff about phishing risks and suspicious links that could trigger the vulnerability. 4. Monitor web application logs and user behavior for anomalies that may indicate exploitation attempts. 5. Engage with brownbagmarketing for official patches or updates addressing this vulnerability and apply them promptly once available. 6. Consider deploying Web Application Firewalls (WAFs) with rules tailored to detect and block XSS payloads targeting the job board. 7. Conduct regular security assessments and penetration tests focusing on client-side vulnerabilities like DOM-based XSS. 8. Limit the exposure of the job board interface to only necessary users and networks where feasible to reduce attack surface.