Back
CVE-2021-3915Unrestricted Upload of File with Dangerous Type in bookstackapp/bookstack
- 7.6HighCVSS base score
- 0.96%Exploitation in 30 daysEPSS · top 38% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
bookstack is vulnerable to Unrestricted Upload of File with Dangerous Type
Timeline
ID reserved
By @huntrdev
- 14 days later
· 14 days later
Published
- 3 years later
· 3 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| @huntrdevCNA (assigner) | 3.0 | High7.6 | CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:H |
| NVDNVD · Modified | 3.1 | Medium5.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.96% · top 38% of all CVEs (12 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.6.
Affected products
bookstackapp · bookstackapp/bookstack
- affected unspecified – < 21.10.3
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Packagistssddanbrown/bookstackGHSA-w2f4-hxpm-mq98 (opens in a new tab)
References
References2
- https://huntr.dev/bounties/fcb65f2d-257a-46f4-bac9-f6ded5649079 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/bookstackapp/bookstack/commit/ae155d67454d6b9f6c93b2bb457aaa4b2eb1a9ed (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2021-2401 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-w2f4-hxpm-mq98 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2021-3915)Record last updated .