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PHP EUVDEUVD-2026-15417

| CVE-2026-4816 MEDIUM
Cross-site Scripting (XSS) (CWE-79)
2026-03-25 INCIBE GHSA-r9fv-65q7-7m5c
XSS PHP
4.8
CVSS 4.0 · NVD
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Severity by source

NVD PRIMARY
4.8 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/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
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
A
Scope
X

Lifecycle Timeline

4
EUVD ID Assigned
Mar 25, 2026 - 14:00 euvd
EUVD-2026-15417
Analysis Generated
Mar 25, 2026 - 14:00 vuln.today
Patch released
Mar 25, 2026 - 14:00 nvd
Patch available
CVE Published
Mar 25, 2026 - 13:31 nvd
MEDIUM 4.8

DescriptionCVE.org

A Reflected Cross Site Scripting (XSS) vulnerability has been found in Support Board v3.7.7. This vulnerability allows an attacker to execute JavaScript code in the victim's browser by sending the victim a malicious URL using the 'search' parameter in '/supportboard/include/articles.php'. This vulnerability can be exploited to steal sensitive user data, such as session cookies, or to perform actions on behalf of the user.

AnalysisAI

A Reflected Cross-Site Scripting (XSS) vulnerability exists in Support Board v3.7.7 that allows unauthenticated attackers to inject malicious JavaScript code via the 'search' parameter in the '/supportboard/include/articles.php' endpoint. Successful exploitation enables attackers to steal session cookies, perform unauthorized actions on behalf of victims, or harvest sensitive user data through victim browsers. A vendor patch is available, and the vulnerability has been officially reported by INCIBE, indicating moderate real-world attention.

Technical ContextAI

This vulnerability is rooted in CWE-79 (Improper Neutralization of Input During Web Page Generation), a classic reflected XSS flaw. The affected component is Support Board by Schiocco (CPE: cpe:2.3:a:schiocco:support_board:*:*:*:*:*:*:*:*), a PHP-based support ticketing system. The vulnerability specifically exists in the articles.php include file, which processes the 'search' parameter without proper input validation or output encoding. This allows attackers to reflect unsanitized user input directly into the HTML response, where a victim's browser interprets and executes it as legitimate JavaScript within the context of the Support Board application domain.

RemediationAI

Upgrade Support Board to the patched version released by Schiocco as detailed in the INCIBE advisory (https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-support-board-schiocco). As an interim mitigation prior to patching, implement Web Application Firewall (WAF) rules to block requests containing suspicious JavaScript payloads in the 'search' parameter, restrict access to the /supportboard/include/articles.php endpoint to authenticated users only via authentication proxy, and deploy Content Security Policy (CSP) headers to prevent inline script execution. Monitor application logs for suspicious 'search' parameter values containing script tags or event handlers, and consider disabling the article search feature entirely until patching is completed.

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EUVD-2026-15417 vulnerability details – vuln.today
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