CVE-2016-20011

HIGHNVD 7.57.5—

7.5

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.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 74.3%
KEV: Not listed

Published

May 25, 2021

Last Modified

November 21, 2024

References (6)

cve@mitrehttps://bugzilla.gnome.org/show_bug.cgi?id=772647
cve@mitrehttps://gitlab.gnome.org/GNOME/libgrss/-/issues/4
cve@mitrehttps://gitlab.gnome.org/GNOME/libgrss/-/merge_requests/7.patch
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.gnome.org/show_bug.cgi?id=772647
af854a3a-2127-422b-91ae-364da2661108https://gitlab.gnome.org/GNOME/libgrss/-/issues/4
af854a3a-2127-422b-91ae-364da2661108https://gitlab.gnome.org/GNOME/libgrss/-/merge_requests/7.patch

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-295Improper Certificate Validation

Data Freshness Timeline

(refreshed 8× in last 7d / 8× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-26 16:08 UTCEG score recompute
2026-05-26 16:08 UTCGHSA enrichment
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:16 UTCepss_batch
2026-05-25 13:46 UTCOSV refresh
2026-05-24 16:43 UTCepss_batch

Frequently asked(5)

What is CVE-2016-20011?

CVE-2016-20011 is a high vulnerability published on May 25, 2021. 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.

When was CVE-2016-20011 disclosed?

CVE-2016-20011 was first published in the National Vulnerability Database on May 25, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2016-20011 actively exploited?

CVE-2016-20011 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 74.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2016-20011?

CVE-2016-20011 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2016-20011?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-20011, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2016-20011

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CVE-2016-20011

📅 Published

🔄 Last Modified

🔗 References (6)