Security readout for executives and security teams
Plain-English summary
Red Hat Quay 3.3.3 had a token-protection flaw in repository email notification authorization. An attacker could add email addresses they do not own to repository notifications. The provided sources do not state severity, CVSS, patch details, or active exploitation.
Executive priority
Treat as a targeted platform hygiene issue unless Quay notifications expose sensitive repository activity. Prioritize confirmation and vendor-guided remediation for any Quay 3.3.3 deployment.
Technical view
The issue is categorized as CWE-284 improper access control. During email address authorization for repository notifications, Quay did not properly protect the authorization token, enabling unauthorized enrollment of email recipients. The source bundle identifies Quay 3.3.3 as affected.
Likely exposure
Exposure is limited to environments running Red Hat Quay, specifically the identified Quay 3.3.3 version in the source bundle. Impact depends on whether repository email notifications are enabled and what information those notifications disclose.
Exploitation context
The CVE source says exploitation could allow adding email addresses not owned by the attacker to repository notifications. CISA KEV status is false, and the provided sources do not report active exploitation or public exploit details.
Researcher notes
Evidence is sparse: no CVSS, no named fixed version, and no exploit-status source beyond KEV false. Focus review on notification email authorization token handling and recipient enrollment controls.
Mitigation direction
- Identify any deployed Red Hat Quay 3.3.3 instances.
- Review Red Hat Bugzilla or vendor guidance for fixed builds or backports.
- Apply vendor-supported updates if Red Hat identifies a corrected release.
- Review repository notification recipient lists for unexpected addresses.
- Remove untrusted notification recipients according to internal change controls.
Validation and detection
- Inventory Quay versions across production and non-production environments.
- Check whether repository email notifications are enabled.
- Review notification recipient lists for unauthorized or unowned addresses.
- Confirm remediation status against Red Hat guidance, not assumptions.
- Document any compensating controls if no vendor fix is available.
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.
CWE-284: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2020-27831 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://bugzilla.redhat.com/show_bug.cgi?id=1905758CVE 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.
Improper Access Control
Improper Access Control represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.