CVE-2021-4017 json
Cross-Site Request Forgery (CSRF) in star7th/showdoc
published 2021-12-01 4 y ago modified 2026-06-17 4 mo ago also GHSA-f77h-m9w2-vvg2 , EUVD-2021-2509
- cvss
- 7.3
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 49%
- public exploits
- 0
- none known
Summary
showdoc is vulnerable to Cross-Site Request Forgery (CSRF)
Patch / fix
- packagist showdoc/showdoc 2.9.13
- star7th star7th/showdoc v2.9.13
Exploit prediction
0.62% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- huntr.dev https://huntr.dev/bounties/1d8439e8-b3f7-40f8-8b30-f9cb05ff2bcd referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 7.3 | CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N |
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.8 | AV:N/AC:M/Au:N/C:P/I:P/A:P |
| GitHub | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | showdoc/showdoc | <2.9.13 |
2.9.13 |
Affected products
- star7th star7th/showdoc
Classification
- Weakness
-
- CWE-352 Cross-Site Request Forgery
References
-
github.com
/star7th/showdoc/commit/654e871a3923e79076818a9a03533fe88222c871
web, patch, third-party-advisory
-
huntr.dev
/bounties/1d8439e8-b3f7-40f8-8b30-f9cb05ff2bcd
web, exploit, patch, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-4017
advisory
-
github.com
/star7th/showdoc
package
Sources
- CVE List CVE-2021-4017
- GitHub Advisory GHSA-f77h-m9w2-vvg2
- NVD CVE-2021-4017
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.