Security readout for executives and security teams
Plain-English summary
Shopware stores running versions through 6.4.3.0 could let a logged-in user abuse SVG media files to run script in another user’s browser. The vendor patched this in 6.4.3.1 and provided plugin-based security measures for older 6.1, 6.2, and 6.3 installations.
Executive priority
Treat this as a near-term remediation item for any Shopware store because compromise could affect customer-facing sessions or administrator trust boundaries. Prioritize public commerce sites and environments with multiple media-management users.
Technical view
CVE-2021-37710 is CWE-79 cross-site scripting in Shopware platform via SVG media files. The CVSS 3.1 score is 8.0, with network access, low attack complexity, low privileges, required user interaction, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is most likely for internet-facing Shopware 6 installations at version 6.4.3.0 or earlier, especially where users can upload or manage media files. The bundle does not identify affected hosted services, extensions, or non-Shopware products.
Exploitation context
The CVSS vector indicates exploitation requires a low-privileged account and user interaction. The source bundle does not cite active exploitation, and CISA KEV status is false, so active exploitation should not be claimed from these sources.
Researcher notes
The public bundle names SVG media files as the XSS vector and identifies the patch commit and advisory. It does not provide enough detail to confirm exact sink behavior, exploit prevalence, or whether default roles can reach the vulnerable path.
Mitigation direction
- Upgrade Shopware platform to 6.4.3.1 or later.
- For 6.1, 6.2, or 6.3, apply Shopware’s security plugin workaround.
- Review vendor advisory details before relying on compensating controls.
- Limit media-management access to trusted users until remediation is complete.
Validation and detection
- Inventory all Shopware platform versions in production and staging.
- Confirm no instance is running 6.4.3.0 or earlier without remediation.
- Check whether the Shopware security plugin is installed on older supported branches.
- Review media upload permissions and recent SVG media activity.
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-2021-37710 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
- High
- CVSS
- 8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
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:L/UI:R/S:U/C:H/I:H/A:H2.15.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/shopware/platform/security/advisories/GHSA-fc38-mxwr-pfhxCVE reference · x_refsource_CONFIRM
- https://github.com/shopware/platform/commit/abe9f69e1f667800f974acccd3047b4930e4b423CVE 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.