Security readout for executives and security teams
Plain-English summary
MISP 2.4.146 has a stored cross-site scripting flaw in the galaxy cluster fork workflow. A crafted cluster value could be saved and later execute script in another user's browser when viewed. Business risk is account/session impact inside a threat-intelligence platform, but the source bundle does not provide severity scoring, affected range, or exploitation evidence.
Executive priority
Treat as a targeted application-risk item for MISP environments, not a confirmed mass-exploitation emergency. Prioritize if MISP is internet-accessible, shared with external partners, or used by privileged analysts.
Technical view
CVE-2021-37534 identifies stored XSS in app/View/GalaxyClusters/add.ctp in MISP 2.4.146 when forking a galaxy cluster. The only cited technical reference is a MISP commit. The bundle does not include CVSS, CWE, affected CPEs, exploit details, or named fixed versions, so validation should focus on version exposure and vendor patch guidance.
Likely exposure
Likely limited to organizations running MISP 2.4.146 with users who can fork galaxy clusters. Exposure depends on whether that workflow is reachable by trusted users, administrators, or external collaborators. The provided sources do not define additional affected versions or deployment conditions.
Exploitation context
No active exploitation is supported by the provided sources. CISA KEV is false in the bundle, and no cited source claims exploitation in the wild. Stored XSS generally requires malicious content to be saved and later viewed by another user.
Researcher notes
Evidence is sparse: the CVE record names MISP 2.4.146, the vulnerable view file, and stored XSS during galaxy cluster forking. The referenced commit is relevant, but the bundle does not provide patch release mapping, exploitability details, CVSS, or CWE metadata.
Mitigation direction
- Identify any MISP 2.4.146 deployments.
- Review the referenced MISP commit and vendor guidance for the correcting change.
- Upgrade MISP according to vendor-supported release guidance.
- Restrict galaxy cluster forking to trusted users until remediated.
- Review audit logs for suspicious galaxy cluster changes.
Validation and detection
- Confirm deployed MISP version and build provenance.
- Check whether galaxy cluster forking is enabled and who can access it.
- Verify the referenced fix is present in the deployed codebase.
- Review recent forked galaxy cluster activity for unusual edits.
- Document findings because source severity and fixed versions are incomplete.
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.
CVE-2021-37534 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://github.com/MISP/MISP/commit/78edbbca64a1edc4390560cc106d0d418064355dCVE 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.