6.1

CVE-2021-37746: claws-mail URL Redirection to Untrusted Site

Modified
AliasesMGASA-2021-0408UBUNTU-CVE-2021-37746DEBIAN-CVE-2021-37746
Published 30-07-2021Last modified 04-08-2024

Vulnerability summary

CVE-2021-37746 is a medium (CVSS 6.1) URL Redirection to Untrusted Site vulnerability in claws-mail. EPSS estimates a 1.16% chance of exploitation in the next 30 days, higher than 67.3% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 6.1, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
6.1/10
010
Medium · v3.1 (NVD)
EPSS score
1.16%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 30-07-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

1.16%

Chance of exploitation in the next 30 days

Percentile

67%

Versus all other CVEs

30-day change

No change 0.00 pp

From 1.16% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.

Debian2 products
  • claws-mail< 3.18.0-1
  • sylpheed< 3.8.0~beta1-1+deb12u1 | < 3.8.0~beta1-2+deb13u1
Mageia2 products
  • claws-mail< 3.18.0-1.mga8
  • sylpheed< 3.7.0-4.1.mga8
Ubuntu2 products
  • claws-mailAll versions (No fix recorded)
  • sylpheedAll versions (No fix recorded)
Claws-mail1 product
Fedoraproject1 product
Sylpheed_project1 product

6 vendors · 9 products

References

12 links
Show all 12 references