CVE-2021-39365

Name: CVE-2021-39365
Creator: NVD / NIST
Published: 2021-08-22T22:15:07.29+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.9/10EPSS 0.87%

Last modified Jun 17, 2026

CVE-2021-39365 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. In GNOME grilo though 0.3.13, grl-net-wc.c does not enable TLS certificate verification on the SoupSessionAsync objects it creates, leaving users vulnerable to network MITM attacks. NOTE: this is similar to CVE-2016-20011.. EPSS estimates a 0.87% chance of exploitation in the next 30 days.

Description

In GNOME grilo though 0.3.13, grl-net-wc.c does not enable TLS certificate verification on the SoupSessionAsync objects it creates, leaving users vulnerable to network MITM attacks. NOTE: this is similar to CVE-2016-20011.

Metrics

CVSS 3.1

5.9/10

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

EPSS Probability

0.87%

54.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-295

Affected Software

Vendor	Product	Versions
Gnome	Grilo	<= 0.3.13
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0
Debian	Debian Linux	11.0

References

https://blogs.gnome.org/mcatanzaro/2021/05/25/reminder-soupsessionsync-and-soupsessionasync-default-to-no-tls-certificate-verification/Vendor Advisory
https://gitlab.gnome.org/GNOME/grilo/-/issues/146Issue Tracking, Patch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2021/09/msg00010.htmlMailing List, Third Party Advisory
https://www.debian.org/security/2021/dsa-4964Third Party Advisory
https://blogs.gnome.org/mcatanzaro/2021/05/25/reminder-soupsessionsync-and-soupsessionasync-default-to-no-tls-certificate-verification/Vendor Advisory
https://gitlab.gnome.org/GNOME/grilo/-/issues/146Issue Tracking, Patch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2021/09/msg00010.htmlMailing List, Third Party Advisory
https://www.debian.org/security/2021/dsa-4964Third Party Advisory

Timeline

Published: Aug 22, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-39365?

How severe is CVE-2021-39365?

CVE-2021-39365 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 0.87% probability of exploitation in the next 30 days.

How do I fix CVE-2021-39365?

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-2021-39365?

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

Scan your code now

Source: NVD / NIST