Umbraco CMS 7.12.3 Content Header Name Persistent 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.
3.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in Umbraco CMS 7.12.3. Impacted is an unknown function of the component Content Header Name Handler. Such manipulation leads to cross site scripting (Persistent). This vulnerability is referenced as CVE-2018-17256. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in Umbraco CMS 7.12.3 (Content Management System) and classified as problematic. Affected by this issue is some unknown functionality of the component Content Header Name Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability (Persistent). Using CWE to declare the problem leads to 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. Impacted is integrity. CVE summarizes:

Persistent cross-site scripting (XSS) vulnerability in Umbraco CMS 7.12.3 allows authenticated users to inject arbitrary web script via the Header Name of a content (Blog, Content Page, etc.). The vulnerability is exploited when updating or removing public access of a content.

The bug was discovered 11/16/2018. The weakness was published 11/27/2018 (Website). The advisory is shared for download at cspcert.ph. This vulnerability is handled as CVE-2018-17256 since 09/20/2018. The attack may be launched remotely. A simple authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1059.007.

The vulnerability was handled as a non-public zero-day exploit for at least 11 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Similar entries are available at VDB-127224, VDB-127222 and VDB-127221. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.6
VulDB Meta Temp Score: 3.6

VulDB Base Score: 2.4
VulDB Temp Score: 2.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Name: Persistent
Class: Cross site scripting / Persistent
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

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

09/20/2018 🔍
11/16/2018 +57 days 🔍
11/27/2018 +11 days 🔍
11/27/2018 +0 days 🔍
11/28/2018 +1 days 🔍
04/15/2020 +504 days 🔍

Sourcesinfo

Advisory: cspcert.ph
Status: Not defined

CVE: CVE-2018-17256 (🔍)
GCVE (CVE): GCVE-0-2018-17256
GCVE (VulDB): GCVE-100-127220
See also: 🔍

Entryinfo

Created: 11/28/2018 10:46
Updated: 04/15/2020 16:21
Changes: 11/28/2018 10:46 (59), 04/15/2020 16:21 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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