CVE-2025-55177 (GCVE-0-2025-55177)

Vulnerability from cvelistv5 – Published: 2025-08-29 15:50 – Updated: 2025-10-21 22:45
VLAI? CISA KEV
Summary
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.
Severity ?
5.4 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:F/RL:O/RC:C
CWE
  • Incorrect Authorization (CWE-863)
Assigner
References
Impacted products
Vendor Product Version
Facebook WhatsApp Desktop for Mac Affected: 2.22.25.2 , < 2.25.21.78 (semver)
Create a notification for this product.
    Facebook WhatsApp Business for iOS Affected: 2.22.25.2 , < 2.25.21.78 (semver)
Create a notification for this product.
    Facebook WhatsApp for iOS Affected: 2.22.25.2 , < 2.25.21.73 (semver)
Create a notification for this product.
CISA KEV
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: bc204b52-7a10-4829-ada6-cad842bcb9d5

Vulnerability ID: CVE-2025-55177

Status: Confirmed

Status Updated: 2025-09-02 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2025-09-02
Asserted: 2025-09-02
Scope
Notes: KEV entry: Meta Platforms WhatsApp Incorrect Authorization Vulnerability | Affected: Meta Platforms / WhatsApp | Description: 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. | 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. | Due date: 2025-09-23 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://www.whatsapp.com/security/advisories/2025/ ; https://nvd.nist.gov/vuln/detail/CVE-2025-55177
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-863
Feed CISA Known Exploited Vulnerabilities Catalog
Product WhatsApp
Due Date 2025-09-23
Date Added 2025-09-02
Vendorproject Meta Platforms
Vulnerabilityname Meta Platforms WhatsApp Incorrect Authorization Vulnerability
Knownransomwarecampaignuse Unknown
References
Created: 2026-02-02 12:25 UTC | Updated: 2026-02-02 12:25 UTC
Show details on NVD website
To clipboard 

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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.