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PatchSiren cyber security CVE debrief

CVE-2025-15490 Passster CVE debrief

The Passster WordPress plugin before 4.2.26 has a flaw in its global protection checks, allowing unauthenticated users to bypass the protection offered via crafted URLs. This vulnerability affects WordPress installations with the Passster plugin, potentially exposing them to unauthorized access. Administrators and security teams should assess the exposure of their Passster WordPress plugin instances and prioritize remediation. The flaw is related to how the plugin handles global protection checks, which can be bypassed using crafted URLs, highlighting the need for immediate attention to prevent potential security breaches.

Vendor
Passster
Product
Passster WordPress plugin
CVSS
MEDIUM 5.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-02
Original CVE updated
2026-09-03
Advisory published
2026-09-02
Advisory updated
2026-09-03

Who should care

Administrators and security teams responsible for WordPress installations with the Passster plugin should assess exposure and prioritize remediation.

Why it matters

CVE-2025-15490 allows unauthenticated users to bypass protection in the Passster WordPress plugin before 4.2.26 via crafted URLs. WordPress administrators and security teams should assess exposure, prioritize remediation, and verify protection status.

  • Verify protection status using the Passster plugin's global protection checks
  • Assess exposure of Passster WordPress plugin versions before 4.2.26
  • Prioritize remediation for affected Passster WordPress plugin instances

Technical summary

The Passster WordPress plugin before 4.2.26 has a flaw in its global protection checks, allowing unauthenticated users to bypass the protection offered via crafted URLs. This technical issue arises from the plugin's handling of protection checks, which can be circumvented by malicious actors using crafted URLs. As a result, WordPress administrators and security teams should assess exposure and prioritize remediation for affected plugin instances.

Defensive priority

Assess exposure and prioritize remediation for Passster WordPress plugin versions before 4.2.26.

Recommended defensive actions

  • Assess exposure of Passster WordPress plugin versions before 4.2.26
  • Prioritize remediation for affected Passster WordPress plugin instances
  • Verify protection status using the Passster plugin's global protection checks

Evidence notes

The CVE record and NVD entry provide details on the vulnerability in the Passster WordPress plugin. The vulnerability allows unauthenticated users to bypass protection offered by the plugin via crafted URLs. Evidence is based on the CVE record and NVD entry, which detail the vulnerability's existence and impact. Further verification is recommended to confirm the protection status of Passster WordPress plugin instances.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-15490 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-15490

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2025-15490 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-15490

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.