CVE-2021-4172 json
Cross-site Scripting (XSS) - Stored in star7th/showdoc
published 2022-01-22 4 y ago modified 2026-06-17 4 mo ago also GHSA-7x22-pmw5-66mq , EUVD-2022-0895
- cvss
- 6.5
- 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 51%
- public exploits
- 0
- none known
Summary
Cross-site Scripting (XSS) - Stored in GitHub repository star7th/showdoc prior to 2.10.2.
Patch / fix
- packagist showdoc/showdoc 2.10.2
- star7th star7th/showdoc 2.10.2
Exploit prediction
0.64% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- huntr.dev https://huntr.dev/bounties/c041b693-877b-4456-b463-19e4c9456eee referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 6.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
| NVD | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 3.5 | AV:N/AC:M/Au:S/C:N/I:P/A:N |
| GitHub | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | showdoc/showdoc | <2.10.2 |
2.10.2 |
Affected products
- star7th star7th/showdoc
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/star7th/showdoc/commit/409c8a1208bbb847046a9496303192980f2e6219
web, patch, third-party-advisory
-
huntr.dev
/bounties/c041b693-877b-4456-b463-19e4c9456eee
web, exploit, patch, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-4172
advisory
-
github.com
/star7th/showdoc
package
Sources
- CVE List CVE-2021-4172
- GitHub Advisory GHSA-7x22-pmw5-66mq
- NVD CVE-2021-4172
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.