CVE-2020-1903

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-10-06 · updated 2026-06-17
Weakness: CWE-400

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.

Affected products

Facebook WhatsApp for Android: before 2.20.61 — fixed in 2.20.61
Whatsapp Business: before 2.20.61 — fixed in 2.20.61

How to fix

Upgrade to a fixed version: Facebook WhatsApp for Android 2.20.61; Whatsapp Business 2.20.61. Check the vendor advisory for mitigations.

References

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