Is PHP affected by CVE-2026-4909?

Organizations using A weakness should be aware of moderate risk from CVE-2026-4909, a cross-site scripting vulnerability rated CVSS 4.8. Attackers could inject scripts to steal sessions or perform actions as authenticated users. Proof-of-concept code is publicly available.

CVE-2026-4909

EUVD-2026-16529 MEDIUM

2026-03-27 VulDB

4.8

CVSS 4.0

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

Scope

Lifecycle Timeline

PoC Detected

Mar 30, 2026 - 13:26 vuln.today

Public exploit code

Analysis Generated

Mar 27, 2026 - 02:45 vuln.today

EUVD ID Assigned

Mar 27, 2026 - 02:45 euvd

EUVD-2026-16529

CVE Published

Mar 27, 2026 - 02:25 nvd

MEDIUM 4.8

Description

A weakness has been identified in code-projects Exam Form Submission 1.0/7.php. This impacts an unknown function of the file /admin/update_s7.php. This manipulation of the argument sname causes cross site scripting. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be used for attacks.

Analysis

Stored cross-site scripting (XSS) in code-projects Exam Form Submission 1.0 allows authenticated remote attackers to inject malicious scripts via the sname parameter in /admin/update_s7.php, potentially compromising administrator sessions and enabling unauthorized actions. Publicly available exploit code exists for this vulnerability, though it requires high-privilege authentication to trigger. …

Remediation

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

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Get intelligence summaries, risk assessment, exploit details, threat intel, and remediation guidance.

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +0.0

CVSS: +24

POC: +20

CVE-2026-4909 vulnerability details – vuln.today

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CVE-2026-4909

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CVE-2026-4909

CVSS Vector

Lifecycle Timeline

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Description

Analysis

Remediation

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External POC / Exploit Code