Gollum Cross-site Scripting vulnerability via filename parameter to New Page dialog

published 2022-07-15 4y ago modified 2026-07-09 4mo ago also GHSA-fj2w-qmjp-3rjm , EUVD-2022-6330

cvss: 6.1; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.8%; EPSS 0.8% chance of exploitation in 30 days, percentile 56%
public exploits: 0; none known

Cross site scripting (XSS) in gollum 5.0 to 5.1.2 via the filename parameter to the 'New Page' dialog.

Patch / fix

fixed in 1 links 2

rubygems gollum 5.1.2

github.com/gollum/gollum@137728c commit
github.com/gollum/gollum/releases/tag/v5.1.2 release

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Exploit prediction

0.79% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
GitHub	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
rubygems	gollum	>=5.0, <5.1.2	5.1.2

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

github.com /gollum/gollum/commit/137728cdabc0f60859fcd30404ad2b8fff6ef715
web
github.com /Szarny/
not-applicable
github.com /gollum/
product, third-party-advisory
github.com /gollum/gollum/releases/tag/v5.1.2
web, release-notes, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2020-35305
advisory
github.com /Szarny
web
github.com /gollum
web
github.com /gollum/gollum
package
github.com /rubysec/ruby-advisory-db/blob/master/gems/gollum/CVE-2020-35305.yml
web
gollum.com
web

Sources

Fencer Intel 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.