Cyber Resilience

CVE-2026-4508

Medium

Published: 20 March 2026

Published
20 March 2026
Modified
22 April 2026
KEV Added
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Patch
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CVSS Score v4 6.9 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/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
EPSS Score 0.0004 13.1th percentile
Risk Priority 14 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-4508 is a medium-severity Injection (CWE-74) vulnerability. Its CVSS base score is 6.9 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 13.1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).

Deeper analysis

CVE-2026-4508 is a SQL injection vulnerability in PbootCMS versions up to 3.2.12. The flaw affects the checkUsername function in the file apps/home/controller/MemberController.php within the Member Login component. Manipulation of the Username argument enables SQL injection, as documented in the CVE description published on 2026-03-20.

The vulnerability carries a CVSS v3.1 base score of 7.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L), meaning it is exploitable remotely over the network with low attack complexity, requiring no privileges or user interaction. Attackers can achieve low-level impacts on confidentiality, integrity, and availability. The attack can be initiated remotely, and a public exploit is available for potential use.

Advisories and reports on mitigation are provided by VulDB at https://vuldb.com/?ctiid.352074, https://vuldb.com/?id.352074, and https://vuldb.com/?submit.773900, along with a detailed English report on GitHub at https://github.com/zzj-create/cvetest/blob/main/VULN-01_MEMBER_LOGIN_SQLI_REPORT_EN.md. The issue maps to CWE-74 (Improper Neutralization of Special Elements used in an SQL Command) and CWE-89 (SQL Injection).

EU & UK References

Vulnerability details

A vulnerability was identified in PbootCMS up to 3.2.12. The impacted element is the function checkUsername of the file apps/home/controller/MemberController.php of the component Member Login. The manipulation of the argument Username leads to sql injection. The attack may be initiated…

more

remotely. The exploit is publicly available and might be used.

CWE(s)
CWE-74CWE-89

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
Why these techniques?

SQL injection in public-facing PbootCMS web app (MemberController login) directly enables remote unauthenticated exploitation for initial access per T1190.

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

CVEs Like This One

CVE-2026-3150Shared CWE-74, CWE-89
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CVE-2025-2683Shared CWE-74, CWE-89
CVE-2026-5238Shared CWE-74, CWE-89
CVE-2026-4288Shared CWE-74, CWE-89
CVE-2026-2220Shared CWE-74, CWE-89
CVE-2025-1535Shared CWE-74, CWE-89
CVE-2026-0597Shared CWE-74, CWE-89
CVE-2026-1688Shared CWE-74, CWE-89
CVE-2026-5018Shared CWE-74, CWE-89

Affected Assets

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-10 Information Input Validation good match
prevent

Directly requires validation and sanitization of the Username input to prevent SQL injection in the checkUsername function.

SI-2 Flaw Remediation good match
prevent

Mandates timely identification, reporting, and correction of the SQL injection flaw in PbootCMS MemberController.php.

RA-5 Vulnerability Monitoring and Scanning partial match
detect

Enables vulnerability scanning to identify SQL injection issues like CVE-2026-4508 in web applications prior to exploitation.

References