Synology Calendar up to 2.1.1 Notification Center Title cross site scripting

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Synology Calendar up to 2.1.1. This affects an unknown function of the component Notification Center. The manipulation of the argument Title as part of Parameter leads to cross site scripting. This vulnerability is uniquely identified as CVE-2018-8915. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Synology Calendar up to 2.1.1 (Calendar Software). This issue affects an unknown functionality of the component Notification Center. The manipulation of the argument title as part of a Parameter leads to a cross site scripting vulnerability. 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. The summary by CVE is:

Cross-site scripting (XSS) vulnerability in Notification Center in Synology Calendar before 2.1.1-0502 allows remote authenticated users to inject arbitrary web script or HTML via title parameter.

The bug was discovered 02/12/2018. The weakness was disclosed 05/10/2018 (Website). It is possible to read the advisory at synology.com. The identification of this vulnerability is CVE-2018-8915 since 03/22/2018. The attack may be initiated remotely. The successful exploitation needs a simple authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 87 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 2.1.1-0502 eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

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

NVD Base Score: 5.4
NVD Vector: 🔍

CNA Base Score: 6.5
CNA Vector (Synology Inc.): 🔍

CVSSv2info

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

NVD Base Score: 🔍

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

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Calendar 2.1.1-0502

Timelineinfo

02/12/2018 🔍
03/22/2018 +38 days 🔍
05/10/2018 +48 days 🔍
05/10/2018 +0 days 🔍
05/10/2018 +0 days 🔍
03/11/2023 +1766 days 🔍

Sourcesinfo

Vendor: synology.com

Advisory: SA_18_06
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-8915 (🔍)
GCVE (CVE): GCVE-0-2018-8915
GCVE (VulDB): GCVE-100-117587

Entryinfo

Created: 05/10/2018 21:40
Updated: 03/11/2023 14:54
Changes: 05/10/2018 21:40 (61), 02/04/2020 10:18 (2), 03/11/2023 14:50 (4), 03/11/2023 14:54 (12)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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