CVEs / CVE-2025-55177
CVE-2025-55177: Meta Platforms WhatsApp Incorrect Authorization Vulnerability
- Known exploited in the CISA KEV catalog since 2 Sep 2025
- medium 5.4 CVSS 3.1 (from the CNA)
- EPSS 13.5% chance of exploitation in the next 30 days, higher than 96% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Meta Platforms WhatsApp contains an incorrect authorization vulnerability due to an incomplete authorization of linked device synchronization messages. This vulnerability could allow an unrelated user to trigger processing of content from an arbitrary URL on a target’s device.
Description
Incomplete authorization of linked device synchronization messages in WhatsApp for iOS prior to v2.25.21.73, WhatsApp Business for iOS v2.25.21.78, and WhatsApp for Mac v2.25.21.78 could have allowed an unrelated user to trigger processing of content from an arbitrary URL on a target’s device. We assess that this vulnerability, in combination with an OS-level vulnerability on Apple platforms (CVE-2025-43300), may have been exploited in a sophisticated attack against specific targeted users.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Facebook WhatsApp Desktop for Mac | from 2.22.25.2, before 2.25.21.78 | 2.25.21.78 |
| Facebook WhatsApp Business for iOS | from 2.22.25.2, before 2.25.21.78 | 2.25.21.78 |
| Facebook WhatsApp for iOS | from 2.22.25.2, before 2.25.21.73 | 2.25.21.73 |
Exploitation
| In CISA KEV since | 2 Sep 2025 |
|---|---|
| Due date for US federal agencies | 23 Sep 2025 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. |
Severity
| CVSS 3.1 | 5.4 mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:NScored by the CNA ([email protected]) |
|---|---|
| Weakness | CWE-863 |
References
- CVE-2025-55177 on NVD
- CVE-2025-55177 in the CISA KEV catalog
- https://www.whatsapp.com/security/advisories/2025/ (cited by CISA)
- https://www.facebook.com/security/advisories/cve-2025-55177 Vendor Advisory
- https://www.whatsapp.com/security/advisories/2025/ Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-55177 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.