Gem in a Box vulnerable to Cross-site Scripting

published 2017-09-25 9 y ago modified 2026-06-17 4 mo ago also GHSA-98hq-3qvg-pg78 , EUVD-2022-3325

cvss: 5.4; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 52%
public exploits: 0; none known

geminabox (aka Gem in a Box) before 0.13.6 has XSS, as demonstrated by uploading a gem file that has a crafted gem.homepage value in its .gemspec file.

Patch / fix

fixed in 1 links 2

rubygems geminabox 0.13.6

github.com/geminabox/geminabox@99aaae1 commit
github.com/geminabox/geminabox/blob/master/CHANGELOG.md advisory

Exploit prediction

0.68% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

baraktawily.blogspot.co.il http://baraktawily.blogspot.co.il/2017/09/gem-in-box-xss-vulenrability-cve-2017.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
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
rubygems	geminabox	<0.13.6	0.13.6

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

github.com /geminabox/geminabox/blob/master/CHANGELOG.md
web, patch, release-notes, third-party-advisory
github.com /geminabox/geminabox/commit/99aaae196c4fc6ae0df28e186ca1e493ae658e02
web
baraktawily.blogspot.co.il /2017/09/gem-in-box-xss-vulenrability-cve-2017.html
web, exploit, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2017-14506
advisory
github.com /geminabox/geminabox
package

Sources

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