Facebook WhatsApp Desktop for Mac Synchronization Message authorization

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.3$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in Facebook WhatsApp Desktop for Mac, WhatsApp Business for iOS and WhatsApp for iOS. This affects an unknown part of the component Synchronization Message Handler. Executing a manipulation can lead to authorization. This vulnerability appears as CVE-2025-55177. In addition, an exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Facebook WhatsApp Desktop for Mac, WhatsApp Business for iOS and WhatsApp for iOS (unknown version). It has been declared as problematic. This vulnerability affects an unknown code block of the component Synchronization Message Handler. The manipulation with an unknown input leads to a authorization vulnerability. The CWE definition for the vulnerability is CWE-863. The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at whatsapp.com. This vulnerability was named CVE-2025-55177 since 08/08/2025. The exploitation appears to be easy. Technical details are unknown but an exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 09/24/2025).

It is declared as attacked. The vulnerability scanner Nessus provides a plugin with the ID 265762 (WhatsApp Desktop for Mac 2.22.25.2 < 2.25.21.78 Incorrect Authorization (August Update)), which helps to determine the existence of the flaw in a target environment. This issue was added on 09/02/2025 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 09/23/2025:

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at Zero-Day.cz (1025), Tenable (265762) and EUVD (EUVD-2025-26214). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.4
CNA Vector (facebook): 🔒

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Authorization
CWE: CWE-863 / CWE-285 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Attacked

EPSS Score: 🔒
EPSS Percentile: 🔒

KEV Added: 🔒
KEV Due: 🔒
KEV Remediation: 🔒
KEV Ransomware: 🔒
KEV Notice: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 265762
Nessus Name: WhatsApp Desktop for Mac 2.22.25.2 < 2.25.21.78 Incorrect Authorization (August Update)

Zero-Day.cz: 🔒

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfo

08/08/2025 CVE reserved
08/29/2025 +21 days Advisory disclosed
08/29/2025 +0 days VulDB entry created
09/24/2025 +26 days VulDB entry last update

Sourcesinfo

Advisory: whatsapp.com
Status: Confirmed

CVE: CVE-2025-55177 (🔒)
GCVE (CVE): GCVE-0-2025-55177
GCVE (VulDB): GCVE-100-321928
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 08/29/2025 18:04
Updated: 09/24/2025 17:01
Changes: 08/29/2025 18:04 (54), 08/30/2025 21:14 (1), 08/30/2025 23:26 (9), 09/02/2025 17:20 (11), 09/02/2025 20:16 (2), 09/24/2025 17:01 (2)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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