Security readout for executives and security teams
Plain-English summary
CVE-2021-36027 is a stored cross-site scripting issue in Magento Commerce. A malicious script placed into a vulnerable form field could run later in another user’s browser. Business risk is mainly theft of sensitive browser-accessible data or session context, depending on the victim and page.
Executive priority
Treat this as a moderate-priority web application security issue. It is not documented here as actively exploited, but internet-facing commerce systems handling customer or staff sessions should be checked and updated promptly because confidentiality impact is rated high.
Technical view
The CVE is CWE-79 stored XSS affecting Magento Commerce 2.4.2 and earlier, 2.4.2-p1 and earlier, and 2.3.7 and earlier. CVSS 3.1 is 6.5: network reachable, low complexity, no privileges required, user interaction required, high confidentiality impact, no scored integrity or availability impact.
Likely exposure
Exposure is likely for organizations running the listed Magento Commerce versions, especially where vulnerable form fields can receive untrusted input and stored content is viewed by staff or customers. The supplied bundle does not identify the specific affected fields or deployment conditions.
Exploitation context
The bundle does not show CISA KEV listing or other cited evidence of active exploitation. Exploitation depends on storing malicious JavaScript in a vulnerable field and a victim later viewing the affected page. No exploit maturity or public weaponization evidence is provided.
Researcher notes
The source bundle gives CVSS, affected version ranges, CWE-79 classification, and Adobe advisory reference, but not vulnerable field names, patch version details, or exploit status. Avoid expanding scope beyond Magento Commerce unless confirmed by Adobe guidance.
Mitigation direction
- Identify Magento Commerce instances and confirm whether listed versions are present.
- Review Adobe APSB21-64 for the vendor-supported security update path.
- Apply vendor guidance through normal emergency change controls where exposure is internet-facing.
- Restrict untrusted access to affected workflows where practical until patched.
- Monitor for suspicious stored content in user-controllable form fields.
Validation and detection
- Inventory Magento Commerce versions across production, staging, and disaster recovery environments.
- Compare deployed versions against the affected version ranges in the CVE record.
- Confirm remediation status against Adobe APSB21-64, not assumptions or package names alone.
- Review application logs for unusual form submissions around sensitive pages.
- Verify no unexpected script content remains in stored form-backed data.
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-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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-2021-36027 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
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N2.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://helpx.adobe.com/security/products/magento/apsb21-64.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 Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.