Microsoft 365 Defender Portal cross site scripting

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
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.
6.2$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Microsoft 365 Defender Portal. The affected element is an unknown function. This manipulation causes cross site scripting. This vulnerability is tracked as CVE-2025-62459. The attack is possible to be carried out remotely. No exploit exists. This product is a managed service, therefore users are not responsible for maintaining vulnerability countermeasures.

Detailsinfo

A vulnerability was found in Microsoft 365 Defender Portal (affected version not known). It has been declared as problematic. Affected by this vulnerability is some unknown functionality. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity.

The advisory is shared at msrc.microsoft.com. This vulnerability is known as CVE-2025-62459 since 10/14/2025. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 12/11/2025). MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

The vulnerability is also documented in the databases at EUVD (EUVD-2025-198367) and CERT Bund (WID-SEC-2025-2688). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

  • Microsoft Azure
  • Microsoft SharePoint
  • Microsoft Defender
  • Microsoft Dynamics 365

Productinfo

Vendor

Name

License

Managed Service

  • yes

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 6.2

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 6.1
NVD Vector: 🔒

CNA Base Score: 8.3
CNA Vector (microsoft): 🔒

CVSSv2info

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

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Status: 🔍

0-Day Time: 🔒

Timelineinfo

10/14/2025 CVE reserved
11/21/2025 +38 days Advisory disclosed
11/21/2025 +0 days VulDB entry created
12/11/2025 +20 days VulDB entry last update

Sourcesinfo

Vendor: microsoft.com

Advisory: msrc.microsoft.com
Status: Confirmed

CVE: CVE-2025-62459 (🔒)
GCVE (CVE): GCVE-0-2025-62459
GCVE (VulDB): GCVE-100-333097
EUVD: 🔒
CERT Bund: WID-SEC-2025-2688 - Microsoft Azure, SharePoint, Defender, Dynamics: Mehrere Schwachstellen

Entryinfo

Created: 11/21/2025 03:16
Updated: 12/11/2025 02:18
Changes: 11/21/2025 03:16 (60), 11/21/2025 03:59 (1), 11/27/2025 11:13 (7), 12/11/2025 02:18 (10)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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