What is the CVSS score of CVE-2021-27329?

CVE-2021-27329 has a CVSS 3.1 base score of 10.0 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H. EPSS exploitation probability: 1.5%.

Is there a public PoC exploit available for CVE-2021-27329?

Yes, a public proof-of-concept exploit is available for CVE-2021-27329. Prioritise patching immediately. EPSS: 1.5%.

Frendica CVE-2021-27329

CRITICAL

Server-Side Request Forgery (SSRF) (CWE-918)

2021-02-18 cve@mitre.org

SSRF Frendica

10.0

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

10.0 CRITICAL

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Feb 18, 2021 - 18:15 nvd

CRITICAL 10.0

DescriptionNVD

Friendica 2021.01 allows SSRF via parse_url?binurl= for DNS lookups or HTTP requests to arbitrary domain names.

AnalysisAI

Friendica 2021.01 allows SSRF via parse_url?binurl= for DNS lookups or HTTP requests to arbitrary domain names. Rated critical severity (CVSS 10.0), 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 Server-Side Request Forgery (SSRF) (CWE-918), which allows attackers to make the server perform requests to unintended internal or external resources. Friendica 2021.01 allows SSRF via parse_url?binurl= for DNS lookups or HTTP requests to arbitrary domain names. Affected products include: Frendi Frendica.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate and allowlist destination URLs, block requests to internal networks, use network segmentation.