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Quasar Form - SQL Injection (CVE-2023-35910)

CVE-2023-35910

Vulnerability CVE-2023-35910 PLUGIN quasar-form HIGH

Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in Nucleus_genius Quasar form free – Contact Form Builder for WordPress allows SQL Injection.This issue affects Quasar form free – Contact Form Builder for WordPress: from n/a through 6.0.

CVE-2023-35910

HIGH CVSS 8.5 Published 2023-11-04 Updated 2026-06-17
AI Risk High (76/100) Active Exploit: No strong signal Published Exploit: No public exploit references Priority: P2 Urgent
Severity Band HIGH
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:L
Affected Components 1
Reference Links 1
AI Risk Engine High (76/100)
Exploitability High
Active Exploitation No strong signal
Published Exploit Status No public exploit references

Threat Timeline

  1. 2023-11-04 CVE published and first recorded in the threat feed.
  2. 2026-06-17 Record updated with latest vulnerability metadata.
  3. 2026-09-22 AI technical context refreshed for mitigation and impact guidance.
  4. Now Monitoring for follow-up changes, linked references, and new related CVEs.

AI Context

Machine-generated threat intelligence

AI Updated 8 days ago

AI enriched 8 days ago (2026-09-22 21:35 UTC)

Technical Summary

Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in Nucleus_genius Quasar form free – Contact Form Builder for WordPress allows SQL Injection.This issue affects Quasar form free – Contact Form Builder for WordPress: from n/a through 6.0.

Potential Impact

Severity is HIGH (CVSS 8.5). Depending on deployment context, affected components may be exposed to unauthorized actions or data integrity risk.

Exploitability Assessment

Exploitability is assessed as High based on severity and technical exposure profile.

Primary risk drivers: severity and technical exposure profile

Mitigation Recommendations

Validate affected product versions, prioritize patching, and monitor references for vendor remediation guidance. If immediate patching is not possible, apply compensating controls and limit exposure of vulnerable surfaces.

Detection & Monitoring

Track authentication anomalies, unexpected file writes, and suspicious plugin API activity around affected components.

Business Impact Lens

AI risk score 76/100 (High, High) with priority P2 Urgent. Prioritize remediation where affected components process customer data, admin sessions, or Internet-exposed workflows.

Affected Products

Quasar Form PLUGIN · quasar-form Affected: <= 6.0 Fixed version not specified

Related Vulnerabilities

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No related vulnerability records were found yet for this context.

References

What to do about this

Patch promptly The consequence is significant even where an attacker needs a foothold first.

Fix it

Update Quasar Form to the latest available version.

Where the vendor has not published a fix yet, disable the plugin until they do.

Cannot update today? Request / payload inspection (WAF) in Hack Halt ProSecure blocks this class of attack before WordPress processes the request.

Inspect request parameters and bodies for injection, traversal and file-inclusion payloads, and refuse the request rather than logging it.

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Not sure if you are affected?

Scan your site to see whether it runs Quasar Form, and at which version.

Free, no installation, no account. It reads what your site already publishes, then tells you which plugins carry known vulnerabilities and what to do about each one.

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Am I affected by this vulnerability?

You are affected if your site runs Quasar Form.

How do I fix it?

Update Quasar Form to the latest available version. Where the vendor has not yet published a fix, remove or disable the plugin until they do. Until you can update, Request / payload inspection (WAF) in Hack Halt ProSecure contains this class of attack at the request layer.

What can an attacker actually do?

This is a SQL Injection flaw. An attacker who exploits it can read, alter or delete anything in the site database, including user accounts and password hashes.

WordPress security that blocks attacks before they land.

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