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CVE-2021-39361

21
FAUCET Score

CVE-2021-39361 describes a vulnerability in GNOME evolution-rss versions up to 0.3.96, where the application fails to perform TLS certificate verification on SoupSessionSync objects. This oversight leaves users susceptible to Man-in-the-Middle (MITM) attacks, allowing an attacker to intercept and potentially alter network traffic. The vulnerability has a CVSS v3.1 score of 5.9 (Medium), indicating a high potential for confidentiality impact with high attack complexity, but does not require user interaction or privileges. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.3.96CPE matchmatch criteria
cpe:2.3:a:gnome:evolution-rss:*:*:*:*:*:*:*:*

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
0.56%
Probability of exploitation in next 30 days
EPSS Percentile
43.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0056 is in the 6th percentile among its peer group of 19,958 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

Remediation records are not available for this CVE.

References

blogs.gnome.org / mcatanzaro/2021/05/25/reminder-soupsessionsync-and-soupsessionasync-default-to-no-tls-certificate-verification
Vendor Advisory
gitlab.gnome.org / GNOME/evolution-rss/-/issues/11
Issue TrackingVendor Advisory