CVE-2021-3915
CVE-2021-3915 — Unrestricted Upload of File with Dangerous Type in bookstackapp/bookstack
bookstack is vulnerable to Unrestricted Upload of File with Dangerous Type
Published Updated Sources: cvelistV5, @huntrdev
Triage
Is it exploited, how likely is exploitation, what does it touch, and how severe do the scoring sources call it.
Exploitation
Unreported
no source claims exploitation
EPSS
1%
chance of exploitation in 30 days
CVSS base
7.6
HIGH
Affected scope
The catalog records vendors and products as separate lists, not pairs, so which product belongs to which vendor is not something this page can say.
Vendors (1)
Products (1)
Every base score collected
Sources score independently and disagree; each row says who scored it and under which version.
| Score | Version | Severity | Expl. | Impact | Source |
|---|---|---|---|---|---|
| 7.6 | CVSS 3.0 | HIGH | — | — | cvelistV5 |
Weakness & attack patterns
- CWE-434
Attack patterns reported against this CVE. The ATT&CK techniques below are inferred from its weakness class.
- T1574.010Hijack Execution Flow: ServicesFile Permissions Weakness
References
2 on the record
- huntr.dev/bounties/fcb65f2d-257a-46f4-bac9-f6ded5649079
x_refsource_CONFIRM
- github.com/bookstackapp/bookstack/commit/ae155d67454d6b9f6c93b2bb457aaa4b2eb1a9ed
x_refsource_MISC
Elsewhere on this site
- bookstackappevery CVE for this vendor
- CWE-434other pages naming this weakness
Not in any source we poll
Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.
- No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
- No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
- No exploit packet captures, log samples, or incident case IDs supplied.