CVE-2016-20011

Name: CVE-2016-20011
Creator: NVD / NIST
Published: 2021-05-25T21:15:07.29+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.47%

Last modified Jun 17, 2026

CVE-2016-20011 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. libgrss through 0.7.0 fails to perform TLS certificate verification when downloading feeds, allowing remote attackers to manipulate the contents of feeds without detection. This occurs because of the default behavior of SoupSessionSync.. EPSS estimates a 1.47% chance of exploitation in the next 30 days.

Description

libgrss through 0.7.0 fails to perform TLS certificate verification when downloading feeds, allowing remote attackers to manipulate the contents of feeds without detection. This occurs because of the default behavior of SoupSessionSync.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.47%

70.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-295

Affected Software

Vendor	Product	Versions
Gnome	Libgrss	<= 0.7.0

References

https://bugzilla.gnome.org/show_bug.cgi?id=772647Issue Tracking, Vendor Advisory
https://gitlab.gnome.org/GNOME/libgrss/-/issues/4Issue Tracking, Vendor Advisory
https://gitlab.gnome.org/GNOME/libgrss/-/merge_requests/7.patchMailing List, Patch, Vendor Advisory
https://bugzilla.gnome.org/show_bug.cgi?id=772647Issue Tracking, Vendor Advisory
https://gitlab.gnome.org/GNOME/libgrss/-/issues/4Issue Tracking, Vendor Advisory
https://gitlab.gnome.org/GNOME/libgrss/-/merge_requests/7.patchMailing List, Patch, Vendor Advisory

Timeline

Published: May 25, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-20011?

How severe is CVE-2016-20011?

CVE-2016-20011 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.47% probability of exploitation in the next 30 days.

How do I fix CVE-2016-20011?

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-2016-20011?

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

Scan your code now

Source: NVD / NIST