Vulnerability · CVE-2026-80099
Improper Authentication
Published Sep 9, 2026 · corrected/updated Sep 9, 2026 · Newfold WP Plugin Web · evidence confidence very high
Several Newfold plugins are vulnerable to Authentication Bypass. The vulnerability exists because the plugins bundle the wp-module-data module. In the module, the method — registered on the filter and therefore evaluated for every unauthenticated REST API request — performs an HMAC-style Bearer token comparison that degenerates when returns : PHP coerces to , collapsing the secret salt to the publicly known constant , while all remaining hash inputs (HTTP method, request URL, raw request body, and the header) remain fully attacker-controlled. This makes it possible for unauthenticated attacker Initial-access exploit intelligence.
Grounded briefings
Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.
Executive
CVE-2026-80099 is a unknown public vulnerability record for Newfold WP Plugin Web. CISA lists it as known exploited. Published remediation guidance: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.
System administrator
Identify whether Newfold WP Plugin Web is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: Newfold WP Plugin Web. Published remediation guidance: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.
Security analyst
Signals on file: EPSS 2.9%. CISA lists it as known exploited. Sources contributing to this record: cve_org, epss, nuclei, vulncheck_kev. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.
Exploitation and remediation
Exploitation evidence
Confirmed in CISA KEV since Sep 9, 2026. Listed in CISA KEV and VulnCheck KEV.
Patch and remediation
Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Safe detection guidance
Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Sep 9, 2026 · CISA KEV
Known exploited
Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Oct 17, 2026 · Nuclei Templates
Detected
CVE-2026-80099 has a public Nuclei detection template.
Affected
- vendor Newfold WP Plugin Webversion unspecified
Sources
- CVE.orgVulnerability recordCVE-2026-80099
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-80099
30-day exploitation probability 2.9%
first.org - Nuclei TemplatesDetection templateCVE-2026-80099
CVE-2026-80099 has a public Nuclei detection template.
github.com - VulnCheck KEVConfirmed exploitationCVE-2026-80099
Several Newfold plugins are vulnerable to Authentication Bypass. The vulnerability exists because the plugins bundle the wp-module-data module. In the module, the method — registered on the filter and therefore evaluated for every unauthenticated REST API request — performs an HM
vulncheck.com