Cross-Site Scripting in mermaid
Priority LOW 38CWE-79Published · Updated
Key facts
- Attack vector
- —
- Privileges required
- —
- User interaction
- —
- Attack complexity
- —
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- —
- Fix status
- Fixed
No CVSS vector from any source. Fix status from GitHub. Impact type from CWE-79.
Summary
Versions of `mermaid` prior to 8.2.3 are vulnerable to Cross-Site Scripting. If malicious input such as `A["<img src=invalid onerror=alert('XSS')></img>"] ` is provided to the application, it will execute the code instead of rendering it as text due to improper output encoding. ## Recommendation Upgrade to version 8.2.3 or later
Why it matters now
Fix Fixed mermaid (npm): 8.2.3
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | mermaid (npm) | before 8.2.3 | 8.2.3 | Patch available | GHSA-w32g-5hqp-gg6q |
- mermaid (npm) Vendor— Affected before 8.2.3 Fixed in 8.2.3 Patch available GHSA-w32g-5hqp-gg6q
Remediation
- Fix · GHSA-w32g-5hqp-gg6q mermaid (npm) Fixed in 8.2.3 Advisory →
Timeline
- 2026-10-03 Threatist record created from GHSA-w32g-5hqp-gg6q
References
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences