Stored XSS due to Unrestricted File Upload in star7th/showdoc

published 2022-03-15 4 y ago modified 2026-06-17 4 mo ago also GHSA-9fcc-7g44-mxrj , EUVD-2022-1394

cvss: 9.4; 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 55%
public exploits: 0; none known

Stored XSS due to Unrestricted 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@3caa323 commit
huntr.dev/bounties/a412707c-18da-4c84-adc0-9801ed8068c9 advisory

Exploit prediction

0.75% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

huntr.dev https://huntr.dev/bounties/a412707c-18da-4c84-adc0-9801ed8068c9 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.0	9.4	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H
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/3caa32334db0c277b84e993eaca2036f5d1dbef8
web, patch, third-party-advisory
huntr.dev /bounties/a412707c-18da-4c84-adc0-9801ed8068c9
web, exploit, issue-tracking, patch, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2022-0942
advisory
github.com /star7th/showdoc
package

Sources

CVE List CVE-2022-0942
GitHub Advisory GHSA-9fcc-7g44-mxrj
NVD CVE-2022-0942

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