CVE-2025-6301 is a cross-site scripting (XSS) vulnerability identified in version 1.0 of the PHPGurukul Notice Board System, specifically within the /admin/manage-notices.php file's Add Notice component. The vulnerability arises due to improper sanitization or validation of user-supplied input in the Title and Description parameters. An attacker can remotely craft malicious input that, when processed by the vulnerable script, results in the injection and execution of arbitrary JavaScript code in the context of the affected web application. This can lead to session hijacking, defacement, or redirection to malicious sites. The vulnerability does not require authentication (as indicated by the CVSS vector's PR:H, which suggests high privileges are required, but the description states the attack may be initiated remotely, implying some ambiguity), but user interaction is necessary (UI:P), meaning the victim must interact with the malicious payload for exploitation to succeed. The CVSS 4.0 base score is 4.8 (medium severity), reflecting limited impact on confidentiality and integrity, and no impact on availability. The vulnerability is publicly disclosed, but no known exploits are currently observed in the wild. The vulnerability affects only version 1.0 of the product, which is a niche web-based notice board system developed by PHPGurukul, likely used in small to medium organizations for internal communications or announcements. The lack of patches or mitigations published by the vendor increases the risk for organizations still running this version. Given the nature of XSS, the attack surface is limited to users who access the affected notice board interface, typically administrators or internal staff, which somewhat limits the scope of impact but still poses a risk for session compromise and lateral movement within affected networks.

For European organizations using PHPGurukul Notice Board System 1.0, this vulnerability could lead to unauthorized script execution within the administrative interface, potentially allowing attackers to hijack admin sessions, steal credentials, or perform actions on behalf of legitimate users. This could result in unauthorized disclosure of sensitive internal communications, manipulation of notices leading to misinformation, or use of the compromised system as a pivot point for further attacks within the corporate network. While the impact on availability is negligible, the integrity and confidentiality of internal data could be compromised. Organizations in sectors with stringent data protection requirements, such as finance, healthcare, and government, could face compliance risks and reputational damage if exploited. The medium severity score reflects that while the vulnerability is not critical, it still poses a meaningful risk if left unaddressed, especially in environments where the notice board system is integrated with other internal tools or contains sensitive information.

1. Immediate mitigation should include implementing strict input validation and output encoding on the Title and Description fields within /admin/manage-notices.php to neutralize malicious scripts. 2. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in the browser context. 3. Restrict access to the notice board administrative interface to trusted IP ranges or via VPN to reduce exposure. 4. Monitor web server logs for suspicious input patterns targeting the affected parameters. 5. If possible, upgrade to a patched or newer version of the PHPGurukul Notice Board System once available. 6. As a temporary workaround, disable the Add Notice functionality or restrict it to a minimal set of trusted users. 7. Educate administrative users about the risks of clicking on suspicious links or interacting with untrusted content within the notice board system. 8. Conduct regular security assessments and penetration tests focusing on web application vulnerabilities to detect similar issues proactively.