WordPress security changelog
CRITICAL CVE-2021-40350 Modified

WordPress component: Privilege escalation or authentication bypass

WordPress component is affected by privilege escalation or authentication bypass. Exposure depends on how the affected operation is made reachable by the site. A successful request can grant permissions or access that the caller should not possess.

CVE / CNA score 9.8 CVSS · cve@mitre.org
NVD score 9.8 CVSS 3.1 · nvd@nist.gov
Component
WordPress component
Plugin slug
Not applicable
Affected
See vendor advisory
Safe version
See mitigation notes
Published
Sep 01, 2021
Weakness
CWE-287 — Improper Authentication

Update, patch or deactivate.

Update WordPress component to a release outside the affected range, or disable and remove it until a fixed version is available.

No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Technical description

webctrl.cgi.elf on Christie Digital DWU850-GS V06.46 devices allows attackers to perform any desired action via a crafted query containing an unspecified Cookie header. Authentication bypass can be achieved by including an administrative cookie that the device does not validate.

NVD vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary and upstream sources