01 Record
CVE-2021-3906
Unrestricted Upload of File with Dangerous Type in bookstackapp/bookstack
MediumPUBLISHEDCNA: @huntrdev
CNA base score5.4 CVSS v3.xCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
02 Description
Unrestricted Upload of File with Dangerous Type in bookstackapp/bookstack
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 0.66% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 51.2% of scored records. A rank, not a probability.
- NVD base score
- 6.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2021-10-27 21:20Z5 YR AGO
- Last updated
- 2024-08-03 17:09Z2 YR AGO
- Reserved
- 2021-10-26
- Assigning CNA
- @huntrdev
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 5.4)
- CNA CVSS vector
- CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- Weaknesses
- CWE-434Unrestricted Upload of File with Dangerous TypeBase
- Data version
- 5.1
- Document digest
- c5cd6ac5391c52b7617c6b67b6382f3b5206dfa2dcffb387c6bfed4fb76b39cf
05 Affected products
VendorProductVersionsPlatforms