Security readout for executives and security teams
Plain-English summary
CVE-2021-21395 affects OpenMage Magento LTS password resets. A malicious site could interfere with the reset process during a narrow user-driven window, potentially impacting confidentiality and integrity of an account. The issue is medium severity, requires user interaction, and is fixed in specific OpenMage releases.
Executive priority
Handle through normal patch management with attention to internet-facing stores. The business risk is account integrity during password reset, but available evidence supports moderate urgency rather than emergency response.
Technical view
This is a CWE-352 cross-site request forgery flaw in OpenMage magento-lts. Affected versions are before 19.4.22 and 20.0.0 through before 20.0.19. The vulnerable window exists after a password reset link is opened and before the new password is submitted.
Likely exposure
Exposure is limited to OpenMage magento-lts deployments running affected versions, especially internet-facing commerce sites with password reset enabled. Magento CE or other products are not named as affected in the provided sources.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation. The CVSS vector indicates network access, high attack complexity, no privileges required, and required user interaction. No exploit steps are needed to assess risk.
Researcher notes
Key constraints are the affected version ranges, the reset-token timing window, and lack of workaround. Validate version lineage carefully because OpenMage is a community-maintained Magento LTS alternative, and the provided sources do not expand affected products beyond openmage/magento-lts.
Mitigation direction
- Upgrade OpenMage magento-lts to 19.4.22, 20.0.19, or later.
- Prioritize affected stores where customer or administrator password resets are externally reachable.
- Do not rely on compensating workarounds; the advisory states none are available.
- Check OpenMage vendor guidance before making additional security-control assumptions.
Validation and detection
- Inventory OpenMage magento-lts versions in dependency manifests and deployed environments.
- Confirm production is not running versions below 19.4.22 or 20.0.19.
- Verify the deployed password reset flow comes from the patched release.
- Record evidence of version checks and deployment dates for audit follow-up.
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-352: 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 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-2021-21395 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
- 4.2 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/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:H/PR:N/UI:R/S:U/C:L/I:L/A:N1.62.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.2MediumVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/OpenMage/magento-lts/security/advisories/GHSA-r3c9-9j5q-pwv4CVE reference · x_refsource_CONFIRM
- https://hackerone.com/reports/1086752CVE reference · x_refsource_MISC
- https://packagist.org/packages/openmage/magento-ltsCVE 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.
Cross-Site Request Forgery (CSRF)
Cross-Site Request Forgery (CSRF) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.