Nokogiri Gem up to 1.11.0.rc3 on Ruby Nokogiri::XML::Schema server-side request forgery

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.1$0-$5k0.00

Summaryinfo

A vulnerability was found in Nokogiri Gem up to 1.11.0.rc3 on Ruby. It has been classified as critical. This issue affects the function Nokogiri::XML::Schema. The manipulation leads to server-side request forgery. This vulnerability is traded as CVE-2020-26247. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Nokogiri Gem up to 1.11.0.rc3 on Ruby (Ruby Gem). It has been rated as critical. This issue affects the function Nokogiri::XML::Schema. The manipulation with an unknown input leads to a server-side request forgery vulnerability. Using CWE to declare the problem leads to CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. Impacted is confidentiality, integrity, and availability.

The weakness was shared 12/31/2020. It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2020-26247. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 242573 (Ubuntu 20.04 LTS / 22.04 LTS : Nokogiri vulnerabilities (USN-7659-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.11.0.rc4 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (242573). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
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: Server-side request forgery
CWE: CWE-918
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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Nessus ID: 242573
Nessus Name: Ubuntu 20.04 LTS / 22.04 LTS : Nokogiri vulnerabilities (USN-7659-1)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Nokogiri Gem 1.11.0.rc4
Patch: github.com

Timelineinfo

12/31/2020 🔍
12/31/2020 +0 days 🔍
07/23/2025 +1665 days 🔍

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2020-26247 (🔍)
GCVE (CVE): GCVE-0-2020-26247
GCVE (VulDB): GCVE-100-167039

Entryinfo

Created: 12/31/2020 12:37
Updated: 07/23/2025 17:20
Changes: 12/31/2020 12:37 (41), 07/23/2025 17:20 (19)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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