Stored xss in showdoc through file upload in star7th/showdoc

published 2022-03-14 4 y ago modified 2026-06-17 4 mo ago also GHSA-mg5h-9rhq-4cqx , EUVD-2022-1479

cvss: 6.3; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 46%
public exploits: 0; none known

Stored xss in showdoc through file upload in GitHub repository star7th/showdoc prior to 2.10.4.

Patch / fix

fixed in 2 links 2

packagist showdoc/showdoc 2.10.4
star7th star7th/showdoc 2.10.4

github.com/star7th/showdoc@42c0d98 commit
huntr.dev/bounties/6127739d-f4f2-44cd-ae3d-e3ccb7f0d7b5 advisory

Exploit prediction

0.55% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

huntr.dev https://huntr.dev/bounties/6127739d-f4f2-44cd-ae3d-e3ccb7f0d7b5 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:L/PR:L/UI:N/S:U/C:L/I:L/A:L
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	<2.10.4	2.10.4

Affected products

star7th star7th/showdoc

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

github.com /star7th/showdoc/commit/42c0d9813df3035728b36116a6ce9116e6fa8ed3
web, patch, third-party-advisory
huntr.dev /bounties/6127739d-f4f2-44cd-ae3d-e3ccb7f0d7b5
web, exploit, issue-tracking, patch, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2022-0937
advisory
github.com /star7th/showdoc
package

Sources

CVE List CVE-2022-0937
GitHub Advisory GHSA-mg5h-9rhq-4cqx
NVD CVE-2022-0937

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.

Summary