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Vulnerabilities

Vulnerability · CVE-2026-80099

Improper Authentication

Published Sep 9, 2026 · catalog updated Sep 9, 2026 · Newfold WP Plugin Web

Patch now

CVE-2026-80099 is in the CISA known-exploited catalog. Confirm Newfold WP Plugin Web against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
Severity
Unknown—
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
2.91%
Remediation
Remediation guidance
Affected products
vendor Newfold WP Plugin Web

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Newfold WP Plugin Webversion unspecified

How to fix CVE-2026-80099

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2026-80099 is in the CISA known-exploited catalog. Confirm Newfold WP Plugin Web against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

No weakness class is stored. EPSS 2.91%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

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.

  1. 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.

  2. Oct 17, 2026 · Nuclei Templates

    Detected

    CVE-2026-80099 has a public Nuclei detection template.

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

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.