Vulnerability Details : CVE-2021-3916
Potential exploit
bookstack is vulnerable to Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Vulnerability category: Directory traversal
Products affected by CVE-2021-3916
- cpe:2.3:a:bookstackapp:bookstack:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-3916
0.37%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 58 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-3916
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.0
|
MEDIUM | AV:N/AC:L/Au:S/C:P/I:N/A:N |
8.0
|
2.9
|
NIST | |
|
6.5
|
MEDIUM | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
2.8
|
3.6
|
huntr.dev | |
|
6.5
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
2.8
|
3.6
|
NIST |
CWE ids for CVE-2021-3916
-
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.Assigned by: security@huntr.dev (Primary)
References for CVE-2021-3916
-
https://huntr.dev/bounties/0be32e6b-7c48-43f0-9cec-433000ad8f64
huntr: Path Traversal PHP Vulnerability in bookstackExploit;Issue Tracking;Patch;Third Party Advisory
-
https://github.com/bookstackapp/bookstack/commit/43830a372fc51a8793199d04a34c3f4ebdfccc7b
Updated showImage file serving to not be traversable · BookStackApp/BookStack@43830a3 · GitHubPatch;Third Party Advisory
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