What is the CVSS score of CVE-2026-57423?

CVE-2026-57423 has a CVSS 3.1 base score of 7.1 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L. EPSS exploitation probability: 0.3%.

Which versions of Message Filter For Contact Form 7 are affected by CVE-2026-57423?

Contact Form 7, a widely-deployed WordPress plugin, contains a reflected cross-site scripting vulnerability affecting versions through 1.6.3.8 that allows attackers to inject malicious code executed…

How to fix or mitigate CVE-2026-57423?

Within 24 hours: Disable the Contact Form 7 plugin and audit server access logs for exploitation attempts; if the plugin must remain active, implement Web Application Firewall (WAF) rules to block malicious payloads targeting the Message Filter parameter. Within 7 days: Inventory all WordPress installations using Contact Form 7 and document affected versions; identify and prepare replacement contact form solutions as contingency. Within 30 days: Upon vendor patch release for version 1.6.3.9 or later, deploy the update across all affected installations after testing in staging; alternatively, migrate to a patched alternative form plugin if vendor remediation remains unavailable.

Message Filter For Contact Form 7 CVE-2026-57423

EUVD-2026-43350 HIGH

Cross-site Scripting (XSS) (CWE-79)

2026-07-13 Patchstack

XSS Message Filter For Contact Form 7

7.1

CVSS 3.1 · Vendor: Patchstack

Severity by source

Vendor (Patchstack) PRIMARY

7.1 HIGH

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

Primary rating from Vendor (Patchstack) · only source for this CVE.

CVSS VectorVendor: Patchstack

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

Low

Lifecycle Timeline

Analysis Generated

Jul 13, 2026 - 10:53 vuln.today

CVE Published

Jul 13, 2026 - 08:41 cve.org

HIGH 7.1

DescriptionCVE.org

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Kofi Mokome Message Filter for Contact Form 7 cf7-message-filter allows Reflected XSS.This issue affects Message Filter for Contact Form 7: from n/a through <= 1.6.3.8.

AnalysisAI

Reflected cross-site scripting in the Message Filter for Contact Form 7 WordPress plugin (versions up to and including 1.6.3.8) lets an attacker embed malicious script in a request parameter that is echoed back unsanitized, executing in the victim's browser when they follow a crafted link. Reported by Patchstack, the flaw carries a scope-changing CVSS 3.1 score of 7.1 and requires user interaction; no public exploit identified at time of analysis and it is not listed in CISA KEV. …

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Recommended ActionAI

Within 24 hours: Disable the Contact Form 7 plugin and audit server access logs for exploitation attempts; if the plugin must remain active, implement Web Application Firewall (WAF) rules to block malicious payloads targeting the Message Filter parameter. …

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