Which versions of PHP are affected by CVE-2026-5665?

CVE-2026-5665 is a critical SQL injection vulnerability in code-projects Online FIR System 1.0 that allows unauthenticated attackers to bypass authentication and directly manipulate database contents…

Is there a public PoC exploit available for CVE-2026-5665?

Yes, a public proof-of-concept exploit is available for CVE-2026-5665. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-5665?

Within 24 hours: Identify all instances of code-projects Online FIR System 1.0 in your environment and take affected systems offline or restrict network access to the login portal (/Login/checklogin.php). Within 7 days: Contact the vendor for patch availability and timelines; implement network segmentation if systems must remain online (restrict login access to trusted IP ranges only, deploy WAF rules to block SQL injection patterns in email/password parameters). Within 30 days: Upgrade to a patched version once released by the vendor, or evaluate replacement solutions if patch availability remains uncertain.

PHP CVE-2026-5665

Q: What is the CVSS score of CVE-2026-5665?

CVE-2026-5665 has a CVSS 4.0 base score of 5.5 (Medium). CVSS vector: 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 exploitation probability: 0.0%.

EUVD-2026-19315 MEDIUM

SQL Injection (CWE-89)

2026-04-06 VulDB

SQLi PHP

5.5

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

5.5 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Lifecycle Timeline

CVSS changed

Apr 29, 2026 - 01:11 NVD

6.9 (MEDIUM) 5.5 (MEDIUM)

PoC Detected

Apr 07, 2026 - 13:20 vuln.today

Public exploit code

EUVD ID Assigned

Apr 06, 2026 - 15:30 euvd

EUVD-2026-19315

Analysis Generated

Apr 06, 2026 - 15:30 vuln.today

CVE Published

Apr 06, 2026 - 15:15 nvd

MEDIUM 6.9

DescriptionCVE.org

A security vulnerability has been detected in code-projects Online FIR System 1.0. Affected by this vulnerability is an unknown functionality of the file /Login/checklogin.php of the component Login. The manipulation of the argument email/password leads to sql injection. The attack is possible to be carried out remotely. The exploit has been disclosed publicly and may be used.

AnalysisAI

SQL injection in code-projects Online FIR System 1.0 allows unauthenticated remote attackers to extract, modify, or delete database contents via the email and password parameters in /Login/checklogin.php. CVSS 7.3 (High) with attack vector Network, Low complexity, and No privileges required. …

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Vulnerability AssessmentAI

Risk Assessment	Real-world risk is elevated despite the absence of CISA KEV listing. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An unauthenticated attacker identifies an internet-facing instance of Online FIR System 1.0 through automated scanning or search engine discovery. Using the publicly available GitHub proof-of-concept at https://github.com/ahmadmarz10-hub/CVEsMarz, the attacker crafts malicious SQL payloads in the email parameter of the /Login/checklogin.php endpoint. …
Remediation	No vendor-released patch identified at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours: Identify all instances of code-projects Online FIR System 1.0 in your environment and take affected systems offline or restrict network access to the login portal (/Login/checklogin.php). …

Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-5665 vulnerability details – vuln.today

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PHP CVE-2026-5665

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

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