CVE-2021-31865
Redmine before 4.0.9, 4.1.x before 4.1.3, and 4.2.x before 4.2.1 allows users to circumvent the...
Redmine before 4.0.9, 4.1.x before 4.1.3, and 4.2.x before 4.2.1 allows users to circumvent the allowed filename extensions of uploaded attachments.
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
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
Redmine before 4.0.9, 4.1.x before 4.1.3, and 4.2.x before 4.2.1 allows users to circumvent the allowed filename extensions of uploaded attachments.
- Record
CVE-2021-31865- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:P/A:N - Updated
- 2026-11-02
CVE List No score
Redmine before 4.0.9, 4.1.x before 4.1.3, and 4.2.x before 4.2.1 allows users to circumvent the allowed filename extensions of uploaded attachments.
- Record
CVE-2021-31865- Updated
- 2026-11-02
EUVDEUVD-2021-18740 No score
Redmine before 4.0.9, 4.1.x before 4.1.3, and 4.2.x before 4.2.1 allows users to circumvent the allowed filename extensions of uploaded attachments.
- Record
EUVD-2021-18740- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-8h6c-gqcj-gcx4
Redmine before 4.0.9, 4.1.x before 4.1.3, and 4.2.x before 4.2.1 allows users to circumvent the...
Redmine before 4.0.9, 4.1.x before 4.1.3, and 4.2.x before 4.2.1 allows users to circumvent the allowed filename extensions of uploaded attachments.
- Record
GHSA-8h6c-gqcj-gcx4- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-863
- Updated
- 2026-11-02
OSV
Redmine before 4.0.9, 4.1.x before 4.1.3, and 4.2.x before 4.2.1 allows users to circumvent the allowed filename extensions of uploaded attachments.
- Record
CVE-2021-31865- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
OSVDEBIAN-CVE-2021-31865
Redmine before 4.0.9, 4.1.x before 4.1.3, and 4.2.x before 4.2.1 allows users to circumvent the allowed filename extensions of uploaded attachments.
- Record
DEBIAN-CVE-2021-31865- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
OSVUBUNTU-CVE-2021-31865
Redmine before 4.0.9, 4.1.x before 4.1.3, and 4.2.x before 4.2.1 allows users to circumvent the allowed filename extensions of uploaded attachments.
- Record
UBUNTU-CVE-2021-31865- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
OSVBIT-redmine-2021-31865 No score
Redmine before 4.0.9, 4.1.x before 4.1.3, and 4.2.x before 4.2.1 allows users to circumvent the allowed filename extensions of uploaded attachments.
- Record
BIT-redmine-2021-31865- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
redmineBitnami |
before 4.0.9, 4.1.0 up to 4.1.3, 4.2.0 up to 4.2.1 | 4.0.94.1.34.2.1 |
redmineDebian:12 |
before 5.0.0-1 | 5.0.0-1 |
redmineDebian:13 |
before 5.0.0-1 | 5.0.0-1 |
redmineDebian:14 |
before 5.0.0-1 | 5.0.0-1 |
redmineDebian:9 From an advisory covering 10 CVEs |
before 3.3.1-4+deb9u4, plus listed versions 3.3.1-43.3.1-4+deb9u13.3.1-4+deb9u23.3.1-4+deb9u3 |
3.3.1-4+deb9u4 |
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 |
|---|---|---|
| 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-2021-31865 is a medium vulnerability (CVSS 5.3) in Redmine, published April 28, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.13%, the 66th percentile. Fixed in redmine 4.0.9.
References
redmine.org/projects/redmine/wiki/Security_Advisories
lists.debian.org/debian-lts-announce/2021/05/msg00013.html
nvd.nist.gov/vuln/detail/CVE-2021-31865
github.com/advisories/GHSA-8h6c-gqcj-gcx4
security-tracker.debian.org/tracker/CVE-2021-31865
ubuntu.com/security/CVE-2021-31865
cve.org/CVERecord?id=CVE-2021-31865