CVE-2021-37156
Redmine 4.2.0 and 4.2.1 allow existing user sessions to continue upon enabling two-factor...
Redmine 4.2.0 and 4.2.1 allow existing user sessions to continue upon enabling two-factor authentication for the user's account, but the intended behavior is for those sessions to be terminated.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
Redmine 4.2.0 and 4.2.1 allow existing user sessions to continue upon enabling two-factor authentication for the user's account, but the intended behavior is for those sessions to be terminated.
- Record
CVE-2021-37156- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:P/A:N - Weakness
- CWE-613
- Updated
- 2026-11-02
CVE List No score
Redmine 4.2.0 and 4.2.1 allow existing user sessions to continue upon enabling two-factor authentication for the user's account, but the intended behavior is for those sessions to be terminated.
- Record
CVE-2021-37156- Updated
- 2026-11-02
EUVDEUVD-2021-23730 No score
Redmine 4.2.0 and 4.2.1 allow existing user sessions to continue upon enabling two-factor authentication for the user's account, but the intended behavior is for those sessions to be terminated.
- Record
EUVD-2021-23730- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-ghph-4rfg-4x3f No score
Redmine 4.2.0 and 4.2.1 allow existing user sessions to continue upon enabling two-factor...
Redmine 4.2.0 and 4.2.1 allow existing user sessions to continue upon enabling two-factor authentication for the user's account, but the intended behavior is for those sessions to be terminated.
- Record
GHSA-ghph-4rfg-4x3f- Weakness
- CWE-613
- Updated
- 2026-11-02
OSV
Redmine 4.2.0 and 4.2.1 allow existing user sessions to continue upon enabling two-factor authentication for the user's account, but the intended behavior is for those sessions to be terminated.
- Record
CVE-2021-37156- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Updated
- 2026-11-02
OSVUBUNTU-CVE-2021-37156
Redmine 4.2.0 and 4.2.1 allow existing user sessions to continue upon enabling two-factor authentication for the user's account, but the intended behavior is for those sessions to be terminated.
- Record
UBUNTU-CVE-2021-37156- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Updated
- 2026-11-02
OSVBIT-redmine-2021-37156 No score
Redmine 4.2.0 and 4.2.1 allow existing user sessions to continue upon enabling two-factor authentication for the user's account, but the intended behavior is for those sessions to be terminated.
- Record
BIT-redmine-2021-37156- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
redmineBitnami |
4.2.0 up to 4.2.1, 4.2.1 up to 4.2.2 | 4.2.14.2.2 |
redmineUbuntu:16.04:LTS |
All versions, plus listed versions 3.0~20140825-83.2.0-13.2.0-33.2.1-13.2.1-23.2.1-2ubuntu0.2 |
None known |
redmineUbuntu:18.04:LTS |
All versions, plus listed versions 3.3.1-43.4.2-13.4.4-13.4.4-1ubuntu0.1 |
None known |
redmineUbuntu:20.04:LTS |
All versions, plus listed versions 4.0.4-14.0.4-34.0.6-2 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| 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-2021-37156 is a high vulnerability (CVSS 7.5) in Redmine, published August 5, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.01%, the 63rd percentile. Fixed in redmine 4.2.1.