CVE-2021-31542: debian debian_linux
Vulnerability summary
CVE-2021-31542 is a high (CVSS 7.5) vulnerability in debian debian_linux. EPSS estimates a 5.33% chance of exploitation in the next 30 days, higher than 92.6% of scored vulnerabilities.
Severe, CVSS 7.5 (NVD); no exploitation reported by the 5 checked sources; EPSS 5% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 14 · Related 10Timeline
- 05-05-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
In Django 2.2 before 2.2.21, 3.1 before 3.1.9, and 3.2 before 3.2.1, MultiPartParser, UploadedFile, and FieldFile allowed directory traversal via uploaded files with suitably crafted file names.
CVSS metrics
6 scores · 4 sources · 3 versions- OSV · PypiEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS trend
Probability
5.33%
Chance of exploitation in the next 30 days
Percentile
93%
Versus all other CVEs
30-day change
No change 0.00 pp
From 5.33% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Debian2 products
- python-django< 1:1.10.7-2+deb9u13 | < 2:2.2.21-1
- debian_linuxEOL9.0
Djangoproject1 product
- django≥ 2.2, < 2.2.21 | ≥ 3.1, < 3.1.9 | ≥ 3.2, < 3.2.1
Fedoraproject1 product
- fedoraEOL34 | 35
PyPI1 product
- django≥ 2.2, < 2.2.21 | ≥ 3.0, < 3.1.9 | ≥ 3.2, < 3.2.1
Ubuntu1 product
- python-django< 1:1.11.11-1ubuntu1.13 | < 2:2.2.12-1ubuntu0.6 | < 1.6.11-0ubuntu1.3+esm3 | < 1.8.7-1ubuntu5.15+esm1
5 vendors · 6 products
References
29 links
- lists.fedoraproject.org/archives/…Vendor Advisory
- security.netapp.com/advisory/ntap-20210618-0001/Third Party Advisory
- lists.fedoraproject.org/archives/…Vendor Advisory
Show all 29 references
- github.com/django/djangoPACKAGE