CVE-2020-15646
If an attacker intercepts Thunderbird's initial attempt to perform automatic account setup using...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2020-15646- 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 - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:P/I:N/A:N - Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2020-15646- Updated
- 2026-11-02
EUVDEUVD-2020-7633 No score
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.
- Record
EUVD-2020-7633- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-4w45-xx62-4547 No score
If an attacker intercepts Thunderbird's initial attempt to perform automatic account setup using...
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.
- Record
GHSA-4w45-xx62-4547- Weakness
- CWE-522
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2020-15646- 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 - Updated
- 2026-11-02
OSVDEBIAN-CVE-2020-15646
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.
- Record
DEBIAN-CVE-2020-15646- 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 - Updated
- 2026-11-02
Show 6 moreShow less
OSVRHSA-2020:2906
Red Hat Security Advisory: thunderbird security update
- Record
RHSA-2020:2906- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVRHSA-2020:2907
Red Hat Security Advisory: thunderbird security update
- Record
RHSA-2020:2907- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVRHSA-2020:2966
Red Hat Security Advisory: thunderbird security update
- Record
RHSA-2020:2966- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVRHSA-2020:3038
Red Hat Security Advisory: thunderbird security update
- Record
RHSA-2020:3038- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVRHSA-2020:3046
Red Hat Security Advisory: thunderbird security update
- Record
RHSA-2020:3046- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2020-15646
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.
- Record
UBUNTU-CVE-2020-15646- 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 - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
thunderbirdDebian:12 |
before 1:68.10.0-1 | 1:68.10.0-1 |
thunderbirdDebian:13 |
before 1:68.10.0-1 | 1:68.10.0-1 |
thunderbirdDebian:14 |
before 1:68.10.0-1 | 1:68.10.0-1 |
thunderbirdDebian:9 From an advisory covering 6 CVEs |
before 1:68.10.0-1~deb9u1, plus listed versions 1.5-41.5.0.2-11.5.0.2-21.5.0.2-31.5.0.4-1 Show 45 moreShow less1.5.0.4-21.5.0.4-31.5.0.5-11.5.0.7-11.5.0.7-21:52.4.0-11:52.4.0-1~deb7u11:52.4.0-1~deb8u11:52.4.0-1~deb9u11:52.4.0-2~exp11:52.5.0-11:52.5.0-1~deb7u11:52.5.0-1~deb8u11:52.5.0-1~deb9u11:52.5.2-11:52.5.2-1~deb7u11:52.5.2-21:52.5.2-2~deb8u11:52.5.2-2~deb9u11:52.6.0-11:52.6.0-1+alpha.11:52.6.0-1+alpha.21:52.6.0-1~deb7u11:52.6.0-1~deb8u11:52.6.0-1~deb9u11:52.7.0-11:52.7.0-1~deb7u11:52.7.0-1~deb8u11:52.7.0-1~deb9u11:52.8.0-11:52.8.0-1~deb7u11:52.8.0-1~deb8u11:52.8.0-1~deb9u11:52.9.0-11:52.9.1-11:52.9.1-1~deb8u11:52.9.1-1~deb9u11:58.0~b3-11:60.0-11:60.0-21:60.0-2~deb9u11:60.0-31:60.0-3~deb9u11:60.0~b10-11:60.0~b2-1 |
1:68.10.0-1~deb9u1 |
thunderbirdDebian:10 From an advisory covering 6 CVEs |
before 1:68.10.0-1~deb10u1, plus listed versions 1:60.7.2-11:60.8.0-11:60.8.0-1~deb10u11:60.8.0-1~deb8u11:60.8.0-1~deb9u1 Show 45 moreShow less1:60.8.0-21:60.9.0-11:60.9.0-1~deb10u11:60.9.0-1~deb8u11:60.9.0-1~deb9u11:65.0~b1-11:66.0~b1-11:67.0~b3-11:68.0~b1-11:68.1.1-1~exp11:68.1.2-1~exp11:68.10.0-1~deb9u11:68.2.1-11:68.2.2-11:68.2.2-1~deb10u11:68.2.2-1~deb8u11:68.2.2-1~deb9u11:68.3.0-11:68.3.0-21:68.3.0-2~deb10u11:68.3.0-2~deb8u11:68.3.0-2~deb9u11:68.3.1-11:68.4.1-11:68.4.1-1~deb10u11:68.4.1-1~deb8u11:68.4.1-1~deb9u11:68.4.2-11:68.5.0-11:68.5.0-1~deb10u11:68.5.0-1~deb8u11:68.5.0-1~deb9u11:68.6.0-11:68.6.0-1~deb10u11:68.6.0-1~deb8u11:68.6.0-1~deb9u11:68.7.0-11:68.7.0-1~deb10u11:68.7.0-1~deb8u11:68.7.0-1~deb9u11:68.8.0-11:68.8.0-1~deb10u11:68.8.0-1~deb8u11:68.8.0-1~deb9u11:68.8.1-1 |
1:68.10.0-1~deb10u1 |
thunderbirdRed Hat:enterprise_linux:7::client From an advisory covering 6 CVEs |
before 0:68.10.0-1.el7_8 | 0:68.10.0-1.el7_8 |
thunderbird-debuginfoRed Hat:enterprise_linux:7::client From an advisory covering 6 CVEs |
before 0:68.10.0-1.el7_8 | 0:68.10.0-1.el7_8 |
thunderbirdRed Hat:enterprise_linux:7::server From an advisory covering 6 CVEs |
before 0:68.10.0-1.el7_8 | 0:68.10.0-1.el7_8 |
thunderbird-debuginfoRed Hat:enterprise_linux:7::server From an advisory covering 6 CVEs |
before 0:68.10.0-1.el7_8 | 0:68.10.0-1.el7_8 |
thunderbirdRed Hat:enterprise_linux:7::workstation From an advisory covering 6 CVEs |
before 0:68.10.0-1.el7_8 | 0:68.10.0-1.el7_8 |
Show 19 moreShow less
| Package | Affected | Fixed |
|---|---|---|
thunderbird-debuginfoRed Hat:enterprise_linux:7::workstation From an advisory covering 6 CVEs |
before 0:68.10.0-1.el7_8 | 0:68.10.0-1.el7_8 |
thunderbirdRed Hat:rhel_eus:8.1::appstream From an advisory covering 6 CVEs |
before 0:68.10.0-1.el8_1 | 0:68.10.0-1.el8_1 |
thunderbird-debuginfoRed Hat:rhel_eus:8.1::appstream From an advisory covering 6 CVEs |
before 0:68.10.0-1.el8_1 | 0:68.10.0-1.el8_1 |
thunderbird-debugsourceRed Hat:rhel_eus:8.1::appstream From an advisory covering 6 CVEs |
before 0:68.10.0-1.el8_1 | 0:68.10.0-1.el8_1 |
thunderbirdRed Hat:enterprise_linux:6::client From an advisory covering 5 CVEs |
before 0:68.10.0-1.el6_10 | 0:68.10.0-1.el6_10 |
thunderbird-debuginfoRed Hat:enterprise_linux:6::client From an advisory covering 5 CVEs |
before 0:68.10.0-1.el6_10 | 0:68.10.0-1.el6_10 |
thunderbirdRed Hat:enterprise_linux:6::server From an advisory covering 5 CVEs |
before 0:68.10.0-1.el6_10 | 0:68.10.0-1.el6_10 |
thunderbird-debuginfoRed Hat:enterprise_linux:6::server From an advisory covering 5 CVEs |
before 0:68.10.0-1.el6_10 | 0:68.10.0-1.el6_10 |
thunderbirdRed Hat:enterprise_linux:6::workstation From an advisory covering 5 CVEs |
before 0:68.10.0-1.el6_10 | 0:68.10.0-1.el6_10 |
thunderbird-debuginfoRed Hat:enterprise_linux:6::workstation From an advisory covering 5 CVEs |
before 0:68.10.0-1.el6_10 | 0:68.10.0-1.el6_10 |
thunderbirdRed Hat:enterprise_linux:8::appstream From an advisory covering 6 CVEs |
before 0:68.10.0-1.el8_2 | 0:68.10.0-1.el8_2 |
thunderbird-debuginfoRed Hat:enterprise_linux:8::appstream From an advisory covering 6 CVEs |
before 0:68.10.0-1.el8_2 | 0:68.10.0-1.el8_2 |
thunderbird-debugsourceRed Hat:enterprise_linux:8::appstream From an advisory covering 6 CVEs |
before 0:68.10.0-1.el8_2 | 0:68.10.0-1.el8_2 |
thunderbirdRed Hat:rhel_e4s:8.0::appstream From an advisory covering 6 CVEs |
before 0:68.10.0-1.el8_0 | 0:68.10.0-1.el8_0 |
thunderbird-debuginfoRed Hat:rhel_e4s:8.0::appstream From an advisory covering 6 CVEs |
before 0:68.10.0-1.el8_0 | 0:68.10.0-1.el8_0 |
thunderbird-debugsourceRed Hat:rhel_e4s:8.0::appstream From an advisory covering 6 CVEs |
before 0:68.10.0-1.el8_0 | 0:68.10.0-1.el8_0 |
thunderbirdUbuntu:16.04:LTS |
before 1:68.10.0+build1-0ubuntu0.16.04.1, plus listed versions 1:38.3.0+build1-0ubuntu21:38.5.1+build2-0ubuntu11:38.6.0+build1-0ubuntu11:38.7.2+build1-0ubuntu0.16.04.11:38.8.0+build1-0ubuntu0.16.04.1 Show 27 moreShow less1:45.2.0+build1-0ubuntu0.16.04.11:45.3.0+build1-0ubuntu0.16.04.21:45.4.0+build1-0ubuntu0.16.04.11:45.5.1+build1-0ubuntu0.16.04.11:45.7.0+build1-0ubuntu0.16.04.11:45.8.0+build1-0ubuntu0.16.04.11:52.1.1+build1-0ubuntu0.16.04.11:52.2.1+build1-0ubuntu0.16.04.11:52.3.0+build1-0ubuntu0.16.04.11:52.4.0+build1-0ubuntu0.16.04.21:52.5.0+build1-0ubuntu0.16.04.11:52.6.0+build1-0ubuntu0.16.04.11:52.7.0+build1-0ubuntu0.16.04.11:52.8.0+build1-0ubuntu0.16.04.11:52.9.1+build3-0ubuntu0.16.04.11:60.2.1+build1-0ubuntu0.16.04.41:60.4.0+build2-0ubuntu0.16.04.11:60.5.1+build2-0ubuntu0.16.04.11:60.6.1+build2-0ubuntu0.16.04.11:60.7.0+build1-0ubuntu0.16.04.11:60.7.1+build1-0ubuntu0.16.04.11:60.7.2+build2-0ubuntu0.16.04.11:60.8.0+build1-0ubuntu0.16.04.21:60.9.0+build1-0ubuntu0.16.04.21:60.9.1+build1-0ubuntu0.16.04.11:68.7.0+build1-0ubuntu0.16.04.21:68.8.0+build2-0ubuntu0.16.04.2 |
1:68.10.0+build1-0ubuntu0.16.04.1 |
thunderbirdUbuntu:18.04:LTS |
before 1:68.10.0+build1-0ubuntu0.18.04.1, plus listed versions 1:52.4.0+build1-0ubuntu21:52.6.0+build1-0ubuntu11:52.7.0+build1-0ubuntu11:52.8.0+build1-0ubuntu0.18.04.11:52.9.1+build3-0ubuntu0.18.04.1 Show 14 moreShow less1:60.2.1+build1-0ubuntu0.18.04.21:60.4.0+build2-0ubuntu0.18.04.11:60.5.1+build2-0ubuntu0.18.04.11:60.6.1+build2-0ubuntu0.18.04.11:60.7.0+build1-0ubuntu0.18.04.11:60.7.1+build1-0ubuntu0.18.04.11:60.7.2+build2-0ubuntu0.18.04.11:60.8.0+build1-0ubuntu0.18.04.11:60.9.0+build1-0ubuntu0.18.04.11:68.2.1+build1-0ubuntu0.18.04.11:68.2.2+build1-0ubuntu0.18.04.11:68.4.1+build1-0ubuntu0.18.04.11:68.7.0+build1-0ubuntu0.18.04.11:68.8.0+build2-0ubuntu0.18.04.2 |
1:68.10.0+build1-0ubuntu0.18.04.1 |
thunderbirdUbuntu:20.04:LTS |
before 1:68.10.0+build1-0ubuntu0.20.04.1, plus listed versions 1:68.1.2+build1-0ubuntu11:68.1.2+build1-0ubuntu21:68.2.1+build1-0ubuntu11:68.2.2+build1-0ubuntu11:68.3.0+build2-0ubuntu1 Show 8 moreShow less1:68.3.1+build1-0ubuntu21:68.4.1+build1-0ubuntu11:68.4.2+build2-0ubuntu11:68.5.0+build1-0ubuntu11:68.6.0+build2-0ubuntu11:68.7.0+build1-0ubuntu11:68.7.0+build1-0ubuntu21:68.8.0+build2-0ubuntu0.20.04.2 |
1:68.10.0+build1-0ubuntu0.20.04.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-15646 is a medium vulnerability (CVSS 5.9) in Mozilla Thunderbird, published July 5, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.96%, the 61st percentile. Fixed in thunderbird 1:68.10.0-1.
References
mozilla.org/security/advisories/mfsa2020-26
bugzilla.mozilla.org/show_bug.cgi?id=1606610
nvd.nist.gov/vuln/detail/CVE-2020-15646
github.com/advisories/GHSA-4w45-xx62-4547
security-tracker.debian.org/tracker/CVE-2020-15646
access.redhat.com/errata/RHSA-2020:2906
Show 36 moreShow less
bugzilla.redhat.com/show_bug.cgi?id=1853014
security.access.redhat.com/data/csaf/v2/advisories/2020/rhsa-2020_2906.json
cve.org/CVERecord?id=CVE-2020-12417
ubuntu.com/security/CVE-2020-15646
Left out here: 91 versions. The JSON record has them.