GHSA-87qx-g5wg-mwmj · Severity: medium · Ecosystem: rubygems — RubyGems Cross-site Scripting vulnerability
RubyGems version Ruby 2.2 series: 2.2.9 and earlier, Ruby 2.3 series: 2.3.6 and earlier, Ruby 2.4 series: 2.4.3 and earlier, Ruby 2.5 series: 2.5.0 and earlier, prior to trunk revision 62422 contains a Cross Site Scripting (XSS) vulnerability in gem server display of homepage attribute that can result in XSS. This attack appear to be exploitable via the victim must browse to a malicious gem on a vulnerable gem server. This vulnerability appears to have been fixed in 2.7.6.
Conclusion & alert: CVE-2018-1000078 is rated Moderate Risk (49.2/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.76%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2025-11-21 | 1.35% | 0.76% | -0.58% |
| 2 | 2025-11-18 | 0.76% | 1.35% | +0.58% |
| 3 | 2025-06-06 | — | 0.76% | — |
Full EPSS history (17 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 6.1 | 3.0 | MEDIUM |
|
2.8 | 2.7 | [email protected] |
| 4.3 | 2.0 | MEDIUM |
|
8.6 | 2.9 | [email protected] |
GHSA-87qx-g5wg-mwmj · Severity: medium · Ecosystem: rubygems — RubyGems Cross-site Scripting vulnerability
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2018-1000078 not yet assigned priority: Debian including 2 source packages (jruby, rubygems), 9 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 9. | https://security-tracker.debian.org/tracker/CVE-2018-1000078 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2018-1000078 |
suse
|
medium | CVE-2018-1000078 severity moderate: SUSE including 299 source package names (2.17-17.3:libruby2_5-2_5-2.5.5-4.3.1, 2.17-17.3:ruby2.5-2.5.5-4.3.1, …), 999 product×package rows across 244 product lines (Container bci/ruby, Container suse/rmt-server, … (244 product lines)): Fixed 842, Known Affected 157. | https://www.suse.com/security/cve/CVE-2018-1000078/ |
ubuntu
|
medium | CVE-2018-1000078 medium priority: Ubuntu including 6 source packages (jruby, ruby1.9.1, ruby2.0, ruby2.1, ruby2.3, ruby2.5), 118 status rows across 20 suites (artful, bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 87, not-affected 12, released 9, needs-triage 8, ignored 2. | https://ubuntu.com/security/CVE-2018-1000078 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| rubygems | rubygems | <= 2.2.9 | cpe:2.3:a:rubygems:rubygems:*:*:*:*:*:*:*:* |
| rubygems | rubygems | <= 2.3.6 | cpe:2.3:a:rubygems:rubygems:*:*:*:*:*:*:*:* |
| rubygems | rubygems | <= 2.4.3 | cpe:2.3:a:rubygems:rubygems:*:*:*:*:*:*:*:* |
| rubygems | rubygems | <= 2.5.0 | cpe:2.3:a:rubygems:rubygems:*:*:*:*:*:*:*:* |
| debian | debian_linux | 7.0 | cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* |