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Vulnerability · Published Jul 30, 2021 · Assigned by mitre

CVE-2021-37746

Medium 6.1

In plain English

A medium-severity security flaw in the claws-mail package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 67% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)6.1Medium
Exploit odds (30 days)1.2%top 32.6% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

textview_uri_security_check in textview.c in Claws Mail before 3.18.0, and Sylpheed through 3.7.0, does not have sufficient link checks before accepting a click.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12claws-mail3.18.0-1DEBIAN-CVE-2021-37746
Debian:13claws-mail3.18.0-1DEBIAN-CVE-2021-37746
Debian:14claws-mail3.18.0-1DEBIAN-CVE-2021-37746
Debian:12sylpheed3.8.0~beta1-1+deb12u1DEBIAN-CVE-2021-37746
Debian:13sylpheed3.8.0~beta1-2+deb13u1DEBIAN-CVE-2021-37746
Ubuntu:22.04:LTSclaws-mailno fix listedUBUNTU-CVE-2021-37746
Ubuntu:24.04:LTSclaws-mailno fix listedUBUNTU-CVE-2021-37746
Ubuntu:25.10claws-mailno fix listedUBUNTU-CVE-2021-37746
Ubuntu:26.04:LTSclaws-mailno fix listedUBUNTU-CVE-2021-37746
Ubuntu:26.10claws-mailno fix listedUBUNTU-CVE-2021-37746
Ubuntu:22.04:LTSsylpheedno fix listedUBUNTU-CVE-2021-37746
Ubuntu:24.04:LTSsylpheedno fix listedUBUNTU-CVE-2021-37746
Ubuntu:25.10sylpheedno fix listedUBUNTU-CVE-2021-37746

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

References