CVE-2020-15646

5.9 mediumEPSS 1.0%

Medium (5.9) in mozilla thunderbird. EPSS 1.0% chance of exploitation in the next 30 days.

If an attacker intercepts Thunderbird's initial attempt to perform automatic account setup using the Microsoft Exchange autodiscovery mechanism, and the attacker sends a crafted response, then Thunderbird sends username and password over https to a server controlled by the attacker. This vulnerability affects Thunderbird < 68.10.0.

Severity

CVSS 3.1

5.9 medium

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS: 1.0% chance of exploitation in the next 30 days; higher than 61% of CVEs (scores of 2026-10-31)
Published: 2020-10-08
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

mozilla:thunderbird

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1606610
https://www.mozilla.org/security/advisories/mfsa2020-26/
https://bugzilla.mozilla.org/show_bug.cgi?id=1606610
https://www.mozilla.org/security/advisories/mfsa2020-26/

Check your stack JSON