What is the CVSS score of CVE-2021-29448?

CVE-2021-29448 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:H. EPSS exploitation probability: 0.7%.

Is there a public PoC exploit available for CVE-2021-29448?

Yes, a public proof-of-concept exploit is available for CVE-2021-29448. Prioritise patching immediately. EPSS: 0.7%.

Ftldns CVE-2021-29448

HIGH

Cross-site Scripting (XSS) (CWE-79)

2021-04-15 security-advisories@github.com

XSS Ftldns Pi Hole Web Interface

8.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.8 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

High

Lifecycle Timeline

CVE Published

Apr 15, 2021 - 16:15 nvd

HIGH 8.8

DescriptionNVD

Pi-hole is a Linux network-level advertisement and Internet tracker blocking application. The Stored XSS exists in the Pi-hole Admin portal, which can be exploited by the malicious actor with the network access to DNS server. See the referenced GitHub security advisory for patch details.

AnalysisAI

Pi-hole is a Linux network-level advertisement and Internet tracker blocking application. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. Pi-hole is a Linux network-level advertisement and Internet tracker blocking application. The Stored XSS exists in the Pi-hole Admin portal, which can be exploited by the malicious actor with the network access to DNS server. See the referenced GitHub security advisory for patch details. Affected products include: Pi-Hole Ftldns, Pi-Hole, Pi-Hole Web Interface.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.