CVE-2014-2576: plugins/rssyl/feed.c in Claws Mail before 3.10.0 disables the CURLOPT_SSL_VERIFYHOST check for CN or SAN host

Q: How do I fix CVE-2014-2576?

claws-mail: upgrade to newer than 3.9.3; opensuse: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2014-2576 being exploited?

CVE-2014-2576 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2014-2576 affect?

CVE-2014-2576 affects claws-mail, opensuse. Severity is medium (CVSS 6.8). plugins/rssyl/feed.c in Claws Mail before 3.10.0 disables the CURLOPT_SSL_VERIFYHOST check for CN or SAN host name fields, which makes it easier for remote attackers to spoof servers and conduct man-in-the-middle (MITM) attacks.

Q: How urgent is CVE-2014-2576?

Priority 49/100. On your watchlist

This month

MEDIUM 6.8WATCHLISTUPGRADEMITIGATE

CVE-2014-2576 is a medium-severity flaw (CVSS 6.8) affecting claws-mail, opensuse. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

plugins/rssyl/feed.c in Claws Mail before 3.10.0 disables the CURLOPT_SSL_VERIFYHOST check for CN or SAN host name fields, which makes it easier for remote attackers to spoof servers and conduct man-in-the-middle (MITM) attacks.

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	6.8 (Medium)
EPSS exploit chance	2.0% (top 19%)
CISA exploited list	No
Weakness	CWE-310
Published	2014-10-15
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: claws-mail · opensuse

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2014-10-15 14:55 UTCPublished CVE record published
2026-06-17 00:06 UTCUpdated Record last modified

claws-mail claws-mail UPGRADE

Affected: <= 3.9.3

Fixed in: newer than 3.9.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy claws-mail || rpm -q claws-mail || claws-mail --version

2. UPGRADE to newer than 3.9.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade claws-mail

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade claws-mail

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

opensuse opensuse MITIGATE

Affected: 12.3 · 13.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 12.3

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2014-2576?

claws-mail: upgrade to newer than 3.9.3; opensuse: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2014-2576 being exploited?

CVE-2014-2576 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2014-2576 affect?

CVE-2014-2576 affects claws-mail, opensuse. Severity is medium (CVSS 6.8). plugins/rssyl/feed.c in Claws Mail before 3.10.0 disables the CURLOPT_SSL_VERIFYHOST check for CN or SAN host name fields, which makes it easier for remote attackers to spoof servers and conduct man-in-the-middle (MITM) attacks.

How urgent is CVE-2014-2576?

Priority 49/100. On your watchlist

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References

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