Which versions of PHP are affected by CVE-2026-2690?

A high-severity authentication vulnerability in itsourcecode Event Management System 1.0 allows attackers to bypass admin login controls through the /admin/ajax.php endpoint.

Is there a public PoC exploit available for CVE-2026-2690?

Yes, a public proof-of-concept exploit is available for CVE-2026-2690. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-2690?

Within 24 hours: Isolate or take offline affected itsourcecode Event Management System instances; disable external access to /admin/ajax.php if the system must remain operational; enable logging on all admin access attempts. Within 7 days: Conduct a security audit of admin account activity for signs of unauthorized access; consider migrating to an alternative event management solution if one exists. Within 30 days: Evaluate vendor's patch timeline and roadmap; if no patch is released, execute full system decommissioning or replace with patched/alternative software.

PHP CVE-2026-2690

Q: What is the CVSS score of CVE-2026-2690?

CVE-2026-2690 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%.

MEDIUM

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') (CWE-74)

2026-02-19 cna@vuldb.com

PHP SQLi Event Management System Admerc

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Lifecycle Timeline

Severity Changed

Apr 29, 2026 - 01:11 NVD

HIGH MEDIUM

CVSS changed

Apr 29, 2026 - 01:11 NVD

7.3 (HIGH) 5.5 (MEDIUM)

Analysis Generated

Mar 12, 2026 - 22:03 vuln.today

PoC Detected

Feb 24, 2026 - 20:42 vuln.today

Public exploit code

CVE Published

Feb 19, 2026 - 07:17 nvd

HIGH 7.3

DescriptionCVE.org

A flaw has been found in itsourcecode Event Management System 1.0. Affected by this vulnerability is an unknown functionality of the file /admin/ajax.php?action=login of the component Admin Login. This manipulation of the argument Username causes sql injection. It is possible to initiate the attack remotely. The exploit has been published and may be used.

AnalysisAI

SQL injection in itsourcecode Event Management System 1.0's admin login endpoint allows unauthenticated remote attackers to manipulate the Username parameter and execute arbitrary database queries. Public exploit code exists for this vulnerability, enabling attackers to potentially extract sensitive data or compromise system integrity. No patch is currently available for affected PHP installations.

Technical ContextAI

Affects the of the component of Event Management System. A flaw has been found in itsourcecode Event Management System 1.0. Affected by this vulnerability is an unknown functionality of the file /admin/ajax.php?action=login of the component Admin Login. This manipulation of the argument Username causes sql injection. It is possible to initiate the attack remotely. The exploit has been published and may be used.

RemediationAI

Monitor vendor advisories for a patch. Use parameterized queries. Implement input validation. Restrict network access to the affected service where possible.