Security readout for executives and security teams
Plain-English summary
Gibbon v22.0.00 has a stored cross-site scripting issue in its wall messages component. A malicious message could persist in the application and run script in another user's browser when viewed. Business risk depends on who can post wall messages and which users view them.
Executive priority
Treat this as a targeted remediation item for any Gibbon v22.0.00 deployment. It is not backed by known exploitation evidence, but stored XSS can affect trusted users and create reputational risk in education environments.
Technical view
The CVE describes stored XSS in Gibbon v22.0.00 wall messages. The source bundle provides no CVSS, CWE, exploit details, or confirmed fixed version. Stored XSS can affect users who render saved attacker-controlled content, potentially exposing browser-session context or enabling unauthorized in-app actions.
Likely exposure
Exposure appears limited to Gibbon v22.0.00 deployments using the wall messages component, especially where students, staff, or other less-trusted users can create posts viewed by higher-privilege users.
Exploitation context
No active exploitation is supported by the supplied sources, and CISA KEV is false. The available evidence only confirms the vulnerability description and affected version, not exploit prevalence or weaponization.
Researcher notes
The public bundle is sparse: no CVSS vector, CWE, advisory text, exploit status, or explicit fix statement is included. v22.0.01 changelog is referenced, but its contents are not provided here, so remediation should be confirmed against vendor guidance.
Mitigation direction
- Inventory Gibbon deployments and identify any running v22.0.00.
- Review Gibbon vendor release notes for the confirmed remediation path.
- Apply the vendor-supported update or guidance once confirmed.
- Restrict wall message posting to trusted users until remediated.
- Monitor wall messages for suspicious embedded active content.
Validation and detection
- Confirm the deployed Gibbon version is not v22.0.00.
- Check whether the wall messages component is enabled and used.
- Review application logs for unusual wall message activity.
- Verify vendor release notes or changelog document the relevant fix.
- Retest stored content rendering after applying vendor guidance.
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-2021-40214 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://gibbonedu.org/CVE reference · x_refsource_MISC
- https://github.com/GibbonEdu/core/releases/download/v22.0.00/GibbonEduCore-InstallBundle.zipCVE reference · x_refsource_MISC
- https://github.com/GibbonEdu/core/blob/v22.0.01/CHANGELOG.txtCVE 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.