Security readout for executives and security teams
Plain-English summary
This issue can let WP Cerber multi-factor authentication be bypassed on versions before 8.9.3. In business terms, a control meant to protect WordPress accounts after password entry may not hold. The public bundle does not provide a CVSS score or active exploitation evidence.
Executive priority
Treat this as a targeted WordPress account-protection risk. Prioritize remediation for internet-facing sites and administrator accounts, but do not describe it as actively exploited based on the supplied evidence.
Technical view
CVE-2021-37597 affects WP Cerber before 8.9.3 and is described as an MFA bypass involving manipulation of the WordPress wordpress_logged_in_[hash] cookie. The source bundle does not include CWE, CVSS, CPE, detailed prerequisites, or a confirmed exploit status.
Likely exposure
Exposure is likely limited to WordPress sites running WP Cerber versions earlier than 8.9.3, especially where WP Cerber MFA protects administrator access. The bundle does not identify affected WordPress versions, configurations, or CPEs.
Exploitation context
The source bundle says the bypass involves wordpress_logged_in_[hash] manipulation, but does not provide safe validation details or attacker prerequisites. It is not listed as KEV, and no cited source in the bundle states active exploitation.
Researcher notes
The public data is sparse: no CVSS, CWE, CPE, or detailed prerequisites are present in the bundle. Analysis should stay anchored to WP Cerber before 8.9.3 and the stated MFA bypass via wordpress_logged_in_[hash] manipulation.
Mitigation direction
- Inventory WordPress sites using WP Cerber.
- Upgrade WP Cerber versions before 8.9.3 to 8.9.3 or newer.
- Prioritize sites where WP Cerber MFA protects administrators.
- Review the FireEye disclosure and vendor guidance for remediation details.
Validation and detection
- Check installed WP Cerber versions across WordPress assets.
- Confirm no production site runs WP Cerber before 8.9.3.
- Verify MFA remains enabled after updating.
- Review access logs for unusual administrator session activity.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2021-37597 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/fireeye/Vulnerability-DisclosuresCVE reference · x_refsource_MISC
- https://github.com/fireeye/Vulnerability-Disclosures/blob/master/FEYE-2021-0023/FEYE-2021-0023.mdCVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.