What is the CVSS score of CVE-2021-28834?

CVE-2021-28834 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 2.8%.

Is there a public PoC exploit available for CVE-2021-28834?

Yes, a public proof-of-concept exploit is available for CVE-2021-28834. Prioritise patching immediately. EPSS: 2.8%.

Is there a patch available for CVE-2021-28834?

Yes, a patch is available for CVE-2021-28834. Update the affected software to the latest version immediately.

Kramdown CVE-2021-28834

CRITICAL

2021-03-19 cve@mitre.org

Information Disclosure Kramdown Fedora Debian Linux

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Mar 19, 2021 - 07:15 nvd

CRITICAL 9.8

DescriptionNVD

Kramdown before 2.3.1 does not restrict Rouge formatters to the Rouge::Formatters namespace, and thus arbitrary classes can be instantiated.

AnalysisAI

Kramdown before 2.3.1 does not restrict Rouge formatters to the Rouge::Formatters namespace, and thus arbitrary classes can be instantiated. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

Technical ContextAI

Kramdown before 2.3.1 does not restrict Rouge formatters to the Rouge::Formatters namespace, and thus arbitrary classes can be instantiated. Affected products include: Kramdown Project Kramdown, Fedoraproject Fedora, Debian Debian Linux. Version information: before 2.3.1.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.