Security readout for executives and security teams
Plain-English summary
CVE-2021-21026 is an authorization weakness in Magento Commerce’s integrations module. It could let an attacker access restricted resources, primarily creating confidentiality risk. The source notes both unauthenticated impact and required admin console access, so exposure should be assessed conservatively against actual admin and integration access paths.
Executive priority
Prioritize this as a confidentiality-focused Magento risk. It is not presented as actively exploited, but affected ecommerce platforms can hold sensitive business and customer data, so version verification and vendor remediation should be scheduled promptly.
Technical view
Affected Magento Commerce versions include 2.4.1 and earlier, 2.4.0-p1 and earlier, and 2.3.6 and earlier. The issue is CWE-285 improper authorization in integrations. CVSS 3.0 is 5.3, with network attack vector, high complexity, low privileges, no user interaction, and high confidentiality impact.
Likely exposure
Organizations running affected Magento Commerce versions are potentially exposed, especially where admin console access or integration management is reachable by lower-trust users. The public bundle does not identify affected CPEs or enumerate specific restricted resources.
Exploitation context
The bundle does not show CISA KEV listing or active exploitation. It states admin console access is required, while also describing an unauthenticated attacker outcome; treat that as incomplete public evidence rather than confirmed unauthenticated exploitation.
Researcher notes
Public detail is limited. The CVSS vector indicates low privileges and high complexity, but the description also says unauthenticated access and admin console access required. Avoid assuming exploitability beyond the integrations module authorization flaw and validate against Adobe’s advisory.
Mitigation direction
- Identify Magento Commerce versions across all production and staging stores.
- Review Adobe APSB21-08 for the vendor-supported update or mitigation path.
- Restrict admin console access to trusted networks and approved administrators.
- Review integration permissions and remove unused or over-privileged integrations.
- Monitor for unusual access to restricted Magento resources.
Validation and detection
- Confirm whether each instance runs 2.4.1 or earlier, 2.4.0-p1 or earlier, or 2.3.6 or earlier.
- Check whether the integrations module is enabled and actively used.
- Review who can access the admin console and integration management functions.
- Verify whether Adobe guidance from APSB21-08 has been applied.
- Look for unexplained access to restricted resources in Magento logs.
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-285: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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 lookupCVE-2021-21026 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
- Medium
- CVSS
- 5.3 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
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 vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N1.63.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
5.3MediumVector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://helpx.adobe.com/security/products/magento/apsb21-08.htmlCVE 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 Authorization
Improper Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.