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CVE-2021-39365

21
FAUCET Score

CVE-2021-39365 is a vulnerability in GNOME grilo versions through 0.3.13, where the grl-net-wc.c component fails to enable TLS certificate verification for SoupSessionAsync objects, making users susceptible to Man-in-the-Middle (MITM) attacks. This medium-severity vulnerability (CVSS 5.9) has a network attack vector and high confidentiality impact, but requires high attack complexity. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.3.13CPE matchmatch criteria
cpe:2.3:a:gnome:grilo:*:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
11.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.87%
Probability of exploitation in next 30 days
EPSS Percentile
55.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0087 is in the 13th percentile among its peer group of 19,956 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: grilo-0:0.3.6-3.el8
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: compat-grilo02
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: grilo

Vendor Advisories (1)

redhatCVE-2021-39365Moderate

grilo: missing TLS certificate verification

Jun 21, 2021

References

blogs.gnome.org / mcatanzaro/2021/05/25/reminder-soupsessionsync-and-soupsessionasync-default-to-no-tls-certificate-verification
Vendor Advisory
gitlab.gnome.org / GNOME/grilo/-/issues/146
Issue TrackingPatchVendor Advisory
lists.debian.org / debian-lts-announce/2021/09/msg00010.html
Mailing ListThird Party Advisory
debian.org / security/2021/dsa-4964
Third Party Advisory