Security readout for executives and security teams
Plain-English summary
CVE-2020-29136 means older cPanel versions could let an attacker bypass two-factor authentication through brute force. For hosting environments, this weakens a control many teams rely on to protect administrative access. The source bundle identifies the fixed boundary as cPanel 90.0.17.
Executive priority
Treat this as a high-priority hosting control-panel risk. A 2FA bypass can materially reduce account protection for systems that manage websites, mail, DNS, and customer hosting operations. Patch validation should be time-bound and asset-driven.
Technical view
The vulnerability affects cPanel before 90.0.17 and is tracked by cPanel as SEC-575. Public sources describe a 2FA bypass via brute-force approach. The bundle does not provide CVSS, CWE, detailed prerequisites, or a vendor-described mitigation beyond the fixed version boundary.
Likely exposure
Exposure is most likely on cPanel or WHM deployments running versions before 90.0.17, especially internet-accessible administrative panels where 2FA was treated as a compensating control.
Exploitation context
The bundle does not show CISA KEV listing or confirmed active exploitation. Digital Defense characterizes the issue as a zero-day disclosure, but the provided evidence is insufficient to claim ongoing exploitation.
Researcher notes
Evidence is sparse: the CVE record gives the fixed version boundary and bypass description, while references provide vendor disclosure and changelog context. Do not infer exploit prerequisites, affected subcomponents, or detection logic beyond the cited sources.
Mitigation direction
- Upgrade cPanel to 90.0.17 or later.
- Review cPanel TSR 2020-0007 and the version 90 changelog.
- Identify internet-facing cPanel and WHM administrative endpoints.
- Check vendor guidance for any supplemental hardening or detection advice.
- Restrict administrative panel access where operationally feasible.
Validation and detection
- Inventory cPanel and WHM versions across managed hosting assets.
- Confirm no production instance remains below 90.0.17.
- Verify 2FA is enabled after upgrade where required.
- Review authentication logs for unusual repeated 2FA attempts.
- Document affected assets and remediation status.
Public sources used
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-2020-29136 mapping review
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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://docs.cpanel.net/changelogs/90-change-log/CVE reference · x_refsource_MISC
- https://news.cpanel.com/cpanel-tsr-2020-0007-full-disclosure/CVE reference · x_refsource_CONFIRM
- https://www.digitaldefense.com/news/zero-day-cpanel-and-webhost-manager/CVE 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.