Nagios XI up to 5.7.1 Background Color Setting cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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3.4$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in Nagios XI up to 5.7.1. Affected is an unknown function of the component Background Color Setting. Such manipulation leads to cross site scripting. This vulnerability is uniquely identified as CVE-2020-36864. The attack can be launched remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Nagios XI up to 5.7.1 and classified as problematic. Affected by this issue is an unknown code block of the component Background Color Setting. The manipulation with an unknown input 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. CVE summarizes:

Nagios XI versions prior to 5.7.2 are vulnerable to cross-site scripting (XSS) via the background color settings in Dashboards. Insufficient validation or escaping of user-supplied input may allow an attacker to inject and execute arbitrary script in the context of a victim's browser.

The weakness was disclosed by TactiFail. The advisory is shared for download at nagios.com. This vulnerability is handled as CVE-2020-36864 since 10/30/2025. The exploitation is known to be easy. The attack may be launched remotely. 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.

Upgrading to version 5.7.2 eliminates this vulnerability. The upgrade is hosted for download at nagios.com.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

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

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: XI 5.7.2

Timelineinfo

10/30/2025 CVE reserved
10/31/2025 +1 days Advisory disclosed
10/31/2025 +0 days VulDB entry created
10/31/2025 +0 days VulDB entry last update

Sourcesinfo

Advisory: nagios.com
Researcher: TactiFail
Status: Confirmed

CVE: CVE-2020-36864 (🔒)
GCVE (CVE): GCVE-0-2020-36864
GCVE (VulDB): GCVE-100-330692

Entryinfo

Created: 10/31/2025 07:53
Changes: 10/31/2025 07:53 (70)
Complete: 🔍
Cache ID: 216::103

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