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Vulnerabilities

Vulnerability · CVE-2026-11907

Missing Authorization

Published Aug 11, 2026 · catalog updated Aug 11, 2026 · Stream – Activity Log & Audit Trail

Patch now

CVE-2026-11907 is in the CISA known-exploited catalog. Confirm Stream – Activity Log & Audit Trail against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
Unknown—
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
0.38%
Remediation
Remediation guidance
Affected products
stated Stream – Activity Log & Audit Trail · vendor xwp Stream – Activity Log & Audit Trail

The Stream plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 4.2.0. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to access all Stream activity records via the Heartbeat API.

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.

  • stated Stream – Activity Log & Audit Trail<= 4.2.0
  • vendor xwp Stream – Activity Log & Audit Trailversion unspecified

How to fix CVE-2026-11907

What to do

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

Should you patch?

CVE-2026-11907 is in the CISA known-exploited catalog. Confirm Stream – Activity Log & Audit Trail against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with Stream – Activity Log & Audit Trail <= 4.2.0. 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 0.38%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

WordPress security

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. Aug 11, 2026 · VulnCheck KEV

    Detected

    The Stream plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 4.2.0. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to access all Stream activity records via the Heartbeat API.

  2. Aug 11, 2026 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Sources

  • CVE.orgVulnerability recordCVE-2026-11907

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-11907

    30-day exploitation probability 0.4%

    first.org
  • VulnCheck KEVConfirmed exploitationCVE-2026-11907

    The Stream plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 4.2.0. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-

    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.