CVE-2021-27329

Name: CVE-2021-27329
Creator: NVD / NIST
Published: 2021-02-18T18:15:11.677+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 10/10EPSS 1.54%

Last modified Jun 17, 2026

CVE-2021-27329 is a critical-severity vulnerability rated 10/10 on the CVSS scale. Friendica 2021.01 allows SSRF via parse_url?binurl= for DNS lookups or HTTP requests to arbitrary domain names.. EPSS estimates a 1.54% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

10/10

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

EPSS Probability

1.54%

71.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-918

Affected Software

Vendor	Product	Versions
Frendi	Frendica	2021.01

References

https://github.com/friendica/friendica/issues/9929Exploit, Issue Tracking, Third Party Advisory
https://github.com/friendica/friendica/issues/9929Exploit, Issue Tracking, Third Party Advisory

Timeline

Published: Feb 18, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-27329?

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

How severe is CVE-2021-27329?

CVE-2021-27329 has a CVSS score of 10/10 (CRITICAL severity). The EPSS model estimates a 1.54% probability of exploitation in the next 30 days.

How do I fix CVE-2021-27329?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-27329?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST