CVE-2021-3758 json
Server-Side Request Forgery (SSRF) in bookstackapp/bookstack
published 2021-09-02 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-27031
- cvss
- 6.3
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 56%
- public exploits
- 0
- none known
Summary
bookstack is vulnerable to Server-Side Request Forgery (SSRF)
Patch / fix
Exploit prediction
0.80% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- huntr.dev https://huntr.dev/bounties/a8d7fb24-9a69-42f3-990a-2db93b53f76b referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 6.3 | CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N |
| NVD | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
| NVD | 2.0 | 4.0 | AV:N/AC:L/Au:S/C:N/I:P/A:N |
Affected products
- bookstackapp bookstackapp/bookstack
Classification
- Weakness
-
- CWE-918 Server-Side Request Forgery
References
-
github.com
/bookstackapp/bookstack/commit/bee5e2c7ca637d034c6985c0328cef0ce068778e
patch, third-party-advisory
-
huntr.dev
/bounties/a8d7fb24-9a69-42f3-990a-2db93b53f76b
exploit, issue-tracking, third-party-advisory
Sources
- CVE List CVE-2021-3758
- NVD CVE-2021-3758
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.