CVE-2025-62077 is a Stored Cross-site Scripting (XSS) vulnerability identified in the Affiliate Link Tracker software developed by SEOSEON EUROPE S.L. This vulnerability stems from improper neutralization of user-supplied input during the generation of web pages, allowing malicious scripts to be stored and later executed in the context of users viewing the affected pages. The flaw affects versions up to and including 0.2, although the exact range is not fully specified. The vulnerability requires an attacker to have high privileges (PR:H) to inject the malicious payload, and user interaction (UI:R) is necessary for the exploit to succeed, such as a victim viewing a compromised page. The CVSS v3.1 base score is 5.9, reflecting medium severity, with attack vector being network (AV:N), low attack complexity (AC:L), and scope changed (S:C), indicating that the vulnerability affects resources beyond the initially vulnerable component. The impact includes limited confidentiality, integrity, and availability loss, as the injected scripts could steal session tokens, manipulate displayed content, or perform unauthorized actions on behalf of users. No known public exploits or patches are currently available, which suggests that exploitation is not widespread yet but remains a risk. The vulnerability is particularly concerning for organizations relying on this affiliate marketing tool to manage links and track campaigns, as attackers could leverage the XSS to compromise user sessions or inject fraudulent content.

For European organizations, the impact of CVE-2025-62077 could be significant in environments where the SEOSEON Affiliate Link Tracker is deployed, especially in marketing, e-commerce, and affiliate management contexts. Successful exploitation could lead to theft of user credentials or session cookies, unauthorized actions performed on behalf of users, defacement of affiliate links, or redirection to malicious sites, undermining trust and potentially causing financial losses. The medium severity indicates that while the vulnerability is not critical, it can still disrupt business operations and damage reputation. Organizations with privileged users who input data into the system are at higher risk, as attackers require such privileges to inject malicious scripts. Additionally, the scope change means that the vulnerability could affect multiple components or users beyond the initial target, increasing the potential impact. Given the absence of known exploits, the threat is currently moderate but could escalate if weaponized. European companies involved in affiliate marketing or digital advertising should be vigilant, as compromised affiliate links can have cascading effects on partner networks and customers.

To mitigate CVE-2025-62077, organizations should implement several specific measures: 1) Restrict and audit user privileges to ensure only trusted users have the ability to input or modify content within the Affiliate Link Tracker, minimizing the risk of malicious payload injection. 2) Employ rigorous input validation and output encoding on all user-supplied data, particularly in areas where affiliate links or tracking parameters are generated or displayed, to neutralize potentially malicious scripts. 3) Monitor logs and user activity for unusual patterns indicative of attempted XSS exploitation, such as unexpected script tags or anomalous link modifications. 4) Isolate the Affiliate Link Tracker application within a segmented network zone to limit lateral movement if compromise occurs. 5) Prepare to apply vendor patches promptly once released and subscribe to vendor security advisories for updates. 6) Educate users about the risks of interacting with suspicious links or content generated by the affiliate system. 7) Consider deploying Web Application Firewalls (WAFs) with rules tailored to detect and block XSS payloads targeting this application. These targeted actions go beyond generic advice and address the specific nature of the vulnerability and its exploitation requirements.