EUVD-2026-39997
GHSA-3fgv-mx7v-rwx5
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Registration requires no privileges (PR:N); stored XSS crosses into victim browser context (S:C, UI:R); no availability impact and confidentiality limited to potential session exposure.
Primary rating from Vendor (VulDB).
CVSS VectorVendor: VulDB
Lifecycle Timeline
3DescriptionCVE.org
A security flaw has been discovered in yashpokharna2555 restaurent-management-system. This impacts an unknown function of the file login_register.php of the component Registration Handler. Performing a manipulation of the argument Username results in cross site scripting. The attack may be initiated remotely. The exploit has been released to the public and may be used for attacks. This product uses a rolling release model to deliver continuous updates. As a result, specific version information for affected or updated releases is not available. The project was informed of the problem early through an issue report but has not responded yet.
AnalysisAI
Cross-site scripting in yashpokharna2555/restaurent-management-system allows remote unauthenticated attackers to inject arbitrary client-side script via the Username argument in login_register.php's Registration Handler. The payload executes in the browser of any user who subsequently views the tainted data - most likely an administrator reviewing registered accounts. A public exploit exists per VulDB and GitHub issue #4; no public exploit identified as confirmed actively exploited (CISA KEV). The CVSS 4.0 base score of 2.1 reflects the limited scope and required victim interaction, but the availability of a POC elevates practical risk for any deployment.
Technical ContextAI
The affected component is a PHP-based restaurant management system hosted on GitHub under the account yashpokharna2555 (CPE: cpe:2.3:a:yashpokharna2555:restaurent-management-system:*:*:*:*:*:*:*:*). The root cause is CWE-79 (Improper Neutralization of Input During Web Page Generation - Cross-site Scripting): the Registration Handler in login_register.php fails to sanitize or encode the Username parameter before persisting it or rendering it in an HTML response. This is consistent with a stored XSS pattern, where attacker-supplied input is written to a data store and later reflected into a page viewed by a privileged user. The technology stack is PHP with no confirmed framework-level output escaping in place.
RemediationAI
No vendor-released patch has been identified at time of analysis - the project maintainer has not responded to the disclosure. Operators running this system should immediately apply HTML output encoding to the Username field in login_register.php before rendering it in any page, using PHP's htmlspecialchars() with ENT_QUOTES and the correct character encoding. As a compensating control, implement a Content Security Policy (CSP) header that prohibits inline script execution, which would substantially reduce the impact of any XSS payload - note that a strict CSP may require refactoring of inline JavaScript present elsewhere in the application. Additionally, restrict access to the user management interface to trusted networks only, reducing the pool of potential victims who could trigger the stored payload. Deploying a web application firewall (WAF) with XSS signature rules can block common payload patterns but should not be treated as a primary control. References: VulDB entry https://vuldb.com/vuln/374494 and the GitHub issue report https://github.com/yashpokharna2555/restaurent-management-system/issues/4.
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External POC / Exploit Code
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