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

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

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. …

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Risk assessment & exploitation conditions
Attack chain visualization
Remediation with exact patch versions
Threat intelligence from 22 sources
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access

Send crafted HTTP request to /admin/ajax.php

Exploit

Inject SQL payload in Username parameter

Execution

Execute arbitrary SQL queries

Impact

Retrieve or modify database contents

Access

Send crafted HTTP request to /admin/ajax.php

Exploit

Inject SQL payload in Username parameter

Execution

Execute arbitrary SQL queries

Impact

Retrieve or modify database contents

Vulnerability AssessmentAI

Exploitation	itsourcecode Event Management System 1.0 with /admin/ajax.php endpoint accessible. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment	CVSS 7.3 (HIGH). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	A remote attacker (requires authentication) could exploit this vulnerability to compromise the affected system.
Remediation	Monitor vendor advisories for a patch. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

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. …

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

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CVE-2026-2690 vulnerability details – vuln.today

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PHP CVE-2026-2690

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

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Attack ChainAIDerived

Vulnerability AssessmentAI

Recommended ActionAI

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External POC / Exploit Code