CVE-2025-52770 identifies a reflected Cross-site Scripting (XSS) vulnerability in the appscreo Hello Followers application, versions up to and including 2.5. The vulnerability stems from improper neutralization of user-supplied input during web page generation, which allows attackers to inject malicious JavaScript code that is reflected back to users. This reflected XSS can be exploited by crafting malicious URLs or input fields that, when clicked or submitted by a user, execute arbitrary scripts in the context of the victim’s browser session. The CVSS 3.1 score of 7.1 indicates a high severity, with an attack vector of network (remote), low attack complexity, no privileges required, but user interaction necessary. The scope is changed (S:C), meaning the vulnerability can affect resources beyond the vulnerable component. The impact affects confidentiality, integrity, and availability, enabling attackers to steal session cookies, manipulate page content, or perform actions on behalf of the user. No patches or known exploits are currently reported, but the vulnerability is publicly disclosed and should be addressed promptly. The vulnerability is particularly relevant for organizations relying on Hello Followers for social media engagement or marketing, as attackers may leverage social engineering to trick users into clicking malicious links. The reflected nature of the XSS means it does not persist on the server, but the risk remains significant due to potential phishing and session hijacking attacks.

For European organizations, this reflected XSS vulnerability poses risks primarily to confidentiality and integrity of user sessions and data. Attackers could hijack user sessions, steal sensitive information, or perform unauthorized actions within the context of the Hello Followers application. This can lead to reputational damage, data breaches, and potential regulatory non-compliance under GDPR if personal data is compromised. Marketing agencies and social media managers using Hello Followers are particularly vulnerable, as attackers may target employees or clients with crafted URLs to execute attacks. The availability impact is lower but still possible if attackers use the vulnerability to inject disruptive scripts. Given the application’s role in social media engagement, exploitation could also facilitate broader phishing campaigns or malware distribution. The lack of known exploits in the wild currently reduces immediate risk, but the public disclosure increases the likelihood of future exploitation attempts. European organizations must consider the threat in the context of their digital marketing and social media tool usage, especially where Hello Followers is integrated.

1. Monitor the vendor’s communications closely for official patches and apply them immediately upon release. 2. Until patches are available, implement Web Application Firewall (WAF) rules to detect and block typical reflected XSS payloads targeting Hello Followers endpoints. 3. Enforce strict input validation and output encoding on all user-supplied data within the application to neutralize malicious scripts. 4. Deploy Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. 5. Educate users and employees about the risks of clicking suspicious links, especially those related to social media tools. 6. Conduct regular security assessments and penetration testing focused on web application vulnerabilities. 7. Review and limit the exposure of Hello Followers interfaces to only trusted networks or authenticated users where feasible. 8. Implement multi-factor authentication (MFA) to reduce the impact of session hijacking. 9. Log and monitor unusual activities related to Hello Followers usage to detect exploitation attempts early.