Security readout for executives and security teams
Plain-English summary
CVE-2021-36212 is a stored cross-site scripting issue in MISP before 2.4.146, specifically in the sharing groups view. A stored XSS bug can let malicious content execute when a user views affected data. The source bundle does not provide CVSS, exploit evidence, or detailed impact.
Executive priority
Prioritize remediation where MISP is internet-accessible, shared across teams, or used by lower-trust accounts. The lack of CVSS and exploitation evidence limits urgency confidence, but stored XSS in a security operations platform still merits timely upgrade.
Technical view
The CVE identifies app/View/SharingGroups/view.ctp in MISP before 2.4.146 as allowing stored XSS in the sharing groups view. The available references are the MISP fixing commit and the v2.4.145 to v2.4.146 comparison. No CWE, CVSS vector, or affected-version granularity beyond “before 2.4.146” is provided.
Likely exposure
Exposure is limited to organizations running MISP versions before 2.4.146 where users can access the sharing groups view. The source bundle does not identify affected deployments, configurations, authentication requirements, or whether hosted services are impacted.
Exploitation context
CISA KEV is false, and the provided sources do not state active exploitation or public weaponization. Treat this as a stored XSS requiring normal vulnerability management attention, with priority based on MISP exposure and user trust boundaries.
Researcher notes
The evidence is sparse: CVE text names the vulnerable file and fixed boundary, while GitHub references show the project change. Avoid assuming exploit preconditions, payload behavior, or privilege impact without reviewing the patch and local MISP access model.
Mitigation direction
- Upgrade MISP to version 2.4.146 or later.
- Review the referenced MISP commit and release comparison.
- Check official MISP guidance for any environment-specific workaround.
- Prioritize systems where untrusted users can influence sharing group content.
Validation and detection
- Inventory MISP instances and record their exact versions.
- Flag any MISP deployment running earlier than 2.4.146.
- Confirm whether users can access the sharing groups view.
- Review change management records for the 2.4.146 update.
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-2021-36212 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/01521d614cb578de75a406394b4f0426f6036ba7CVE reference · x_refsource_MISC
- https://github.com/MISP/MISP/compare/v2.4.145...v2.4.146CVE 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.