CVE-2025-7903 is a medium-severity vulnerability affecting yangzongzhuan RuoYi versions up to 4.8.1. The issue lies within an unspecified functionality of the Image Source Handler component, which improperly restricts rendered UI layers. This flaw allows an attacker to remotely manipulate the rendering of UI layers, potentially altering the visual output or interface behavior without requiring user interaction or elevated privileges beyond low privileges. The vulnerability has a CVSS 4.0 base score of 5.3, indicating a moderate risk. The attack vector is network-based (AV:N), with low attack complexity (AC:L), no privileges required (PR:L), and no user interaction needed (UI:N). The impact is limited primarily to integrity (VI:L), with no direct impact on confidentiality or availability. The vulnerability does not affect system confidentiality or availability but may allow an attacker to manipulate the UI rendering, which could be leveraged for phishing, UI spoofing, or misleading users into performing unintended actions. Although no public exploits are currently known in the wild, the exploit details have been disclosed, increasing the risk of future exploitation. No patches or mitigations have been explicitly linked yet, so organizations using affected versions should prioritize monitoring and mitigation efforts.

For European organizations using yangzongzhuan RuoYi versions 4.8.0 or 4.8.1, this vulnerability could undermine the integrity of user interfaces in applications relying on the Image Source Handler component. This may lead to UI manipulation attacks such as spoofing or misleading displays, potentially facilitating social engineering or unauthorized actions by deceived users. While the vulnerability does not directly compromise data confidentiality or system availability, the integrity impact can indirectly lead to security breaches or fraud. Sectors with high reliance on RuoYi for internal or customer-facing applications—such as finance, government, and critical infrastructure—may face increased risk. The remote exploitability and lack of user interaction requirement make it easier for attackers to attempt exploitation over the network, increasing the threat surface. However, the medium severity and limited impact scope suggest that the threat is moderate but should not be ignored, especially in environments where UI integrity is critical for security.

1. Immediate mitigation should include upgrading to a patched version of yangzongzhuan RuoYi once available. Since no patch links are currently provided, organizations should monitor vendor advisories closely. 2. Implement network-level protections such as web application firewalls (WAFs) to detect and block suspicious requests targeting the Image Source Handler component. 3. Conduct thorough code reviews and UI integrity checks in applications using RuoYi to detect anomalous UI rendering behavior. 4. Employ strict input validation and sanitization on any data processed by the Image Source Handler to reduce the risk of manipulation. 5. Increase user awareness and training to recognize potential UI spoofing or manipulation attempts, especially for high-risk user groups. 6. Monitor logs and network traffic for unusual patterns that could indicate exploitation attempts. 7. Restrict access to the affected component to trusted networks or authenticated users where feasible to reduce exposure. 8. Consider implementing multi-factor authentication and transaction verification steps in critical workflows to mitigate risks from UI manipulation.