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CVE-2018-1000078· NVD / CVE Program· CNA mitre

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

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.

MediumCVSS 6.1 · v3.0—No exploit Fix available
Published
Mar 13, 2018
Updated
Jun 16, 2026
EPSS
2.7% · 86th percentile
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Report tools

JSON

Action score

25

Monitor

Low priority for now.

CVSS
24 / 40 · 6.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 2.7%

Affected systems

VendorProduct
rubygemsrubygems
debiandebian linux

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • debian debian linux7.0
  • rubygems rubygemsup to 2.2.9 inclusive
  • rubygems rubygemsup to 2.3.6 inclusive
  • rubygems rubygemsup to 2.4.3 inclusive
  • rubygems rubygemsup to 2.5.0 inclusive

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12jrubybefore 9.1.17.0-19.1.17.0-1
Debian:12rubygemsbefore 3.2.0~rc.1-13.2.0~rc.1-1
Debian:7jrubybefore 1.5.6-5+deb7u11.5.6-5+deb7u1
Debian:7ruby1.9.1before 1.9.3.194-8.1+deb7u81.9.3.194-8.1+deb7u8
Debian:7rubygemsbefore 1.8.24-1+deb7u21.8.24-1+deb7u2
Debian:8jrubybefore 1.5.6-9+deb8u11.5.6-9+deb8u1
Debian:8ruby2.1before 2.1.5-2+deb8u42.1.5-2+deb8u4
Debian:9jrubybefore 1.7.26-1+deb9u11.7.26-1+deb9u1
Debian:9ruby2.3before 2.3.3-1+deb9u32.3.3-1+deb9u3
Mavenorg.jruby:jruby-stdlibbefore 9.1.16.09.1.16.0
Mavenorg.jruby:jruby-stdlibbefore 9.1.16.09.1.16.0
openSUSE:Leap 15.0ruby-bundled-gems-rpmhelperbefore 0.0.2-lp151.2.10.0.2-lp151.2.1
openSUSE:Leap 15.0ruby2.5before 2.5.5-lp151.4.3.12.5.5-lp151.4.3.1
Red Hat:enterprise_linux:7::clientrubybefore 0:2.0.0.648-36.el70:2.0.0.648-36.el7
Red Hat:enterprise_linux:7::clientruby-debuginfobefore 0:2.0.0.648-36.el70:2.0.0.648-36.el7
Red Hat:enterprise_linux:7::clientruby-develbefore 0:2.0.0.648-36.el70:2.0.0.648-36.el7
Red Hat:enterprise_linux:7::clientruby-docbefore 0:2.0.0.648-36.el70:2.0.0.648-36.el7
Red Hat:enterprise_linux:7::clientruby-irbbefore 0:2.0.0.648-36.el70:2.0.0.648-36.el7
Red Hat:enterprise_linux:7::clientruby-libsbefore 0:2.0.0.648-36.el70:2.0.0.648-36.el7
Red Hat:enterprise_linux:7::clientruby-tcltkbefore 0:2.0.0.648-36.el70:2.0.0.648-36.el7
Red Hat:enterprise_linux:7::clientrubygem-bigdecimalbefore 0:1.2.0-36.el70:1.2.0-36.el7
Red Hat:enterprise_linux:7::clientrubygem-io-consolebefore 0:0.4.2-36.el70:0.4.2-36.el7
Red Hat:enterprise_linux:7::clientrubygem-jsonbefore 0:1.7.7-36.el70:1.7.7-36.el7
Red Hat:enterprise_linux:7::clientrubygem-minitestbefore 0:4.3.2-36.el70:4.3.2-36.el7

+96

Same product

rubygems: all records

Other highest-scoring records for the same primary product.

  • CVE-2017-0903RubyGems versions between 2.0.0 and 2.6.13 are vulnerable to a possible remote code execution vulnerability.
    44Plan
  • CVE-2017-0899RubyGems version 2.6.12 and earlier is vulnerable to maliciously crafted gem specifications that include terminal escape characters.
    42Plan
  • CVE-2018-1000076RubyGems 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
    40Plan
  • CVE-2017-0901RubyGems version 2.6.12 and earlier fails to validate specification names, allowing a maliciously crafted gem to potentially overwrite any f
    39Monitor
  • CVE-2019-8324An issue was discovered in RubyGems 2.6 and later through 3.0.2.
    36Monitor
  • CVE-2022-36073RubyGems allows creation of users with arbitrary unverified emails
    35Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
n/a n/a2.7.6 · descriptionVendor (CNA)
debian:jruby9.1.17.0-1 · Debian:12Package registry (OSV)
debian:ruby1.9.11.9.3.194-8.1+deb7u8 · Debian:7Package registry (OSV)
debian:ruby2.12.1.5-2+deb8u4 · Debian:8Package registry (OSV)
debian:ruby2.32.3.3-1+deb9u3 · Debian:9Package registry (OSV)
debian:rubygems3.2.0~rc.1-1 · Debian:12Package registry (OSV)
Maven:org.jruby:jruby-stdlib9.1.16.0Package registry (OSV)
opensuse:ruby-bundled-gems-rpmhelper0.0.2-lp151.2.1 · openSUSE:Leap 15.0Package registry (OSV)
opensuse:ruby2.52.5.5-lp151.4.3.1 · openSUSE:Leap 15.0Package registry (OSV)
red hat:rh-ruby23-ruby0:2.3.8-69.el6 · Red Hat:rhel_software_collections:3::el6Package registry (OSV)
red hat:rh-ruby23-ruby-debuginfo0:2.3.8-69.el6 · Red Hat:rhel_software_collections:3::el6Package registry (OSV)
red hat:rh-ruby23-ruby-devel0:2.3.8-69.el6 · Red Hat:rhel_software_collections:3::el6Package registry (OSV)
red hat:rh-ruby23-ruby-doc0:2.3.8-69.el6 · Red Hat:rhel_software_collections:3::el6Package registry (OSV)
red hat:rh-ruby23-ruby-irb0:2.3.8-69.el6 · Red Hat:rhel_software_collections:3::el6Package registry (OSV)
red hat:rh-ruby23-ruby-libs0:2.3.8-69.el6 · Red Hat:rhel_software_collections:3::el6Package registry (OSV)
red hat:rh-ruby23-ruby-tcltk0:2.3.8-69.el6 · Red Hat:rhel_software_collections:3::el6Package registry (OSV)
red hat:rh-ruby23-rubygem-bigdecimal0:1.2.8-69.el6 · Red Hat:rhel_software_collections:3::el6Package registry (OSV)
red hat:rh-ruby23-rubygem-did_you_mean0:1.0.0-69.el6 · Red Hat:rhel_software_collections:3::el6Package registry (OSV)
red hat:rh-ruby23-rubygem-io-console0:0.4.5-69.el6 · Red Hat:rhel_software_collections:3::el6Package registry (OSV)
red hat:rh-ruby23-rubygem-json0:1.8.3.1-69.el6 · Red Hat:rhel_software_collections:3::el6Package registry (OSV)
red hat:rh-ruby23-rubygem-minitest0:5.8.5-69.el6 · Red Hat:rhel_software_collections:3::el6Package registry (OSV)
RubyGems:rubygems-update2.7.6Package registry (OSV)
suse:ruby2.52.5.5-4.3.1 · SUSE:Linux Enterprise Module for Basesystem 15Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
low · data can be read
Integrity
low · data or configuration can be modified
Availability
none

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Changed
Confidentiality impact
Low
Integrity impact
Low
Availability impact
None

Weakness class (CWE)

CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

nvd-primary

Root cause

User content is inserted into the page as HTML. The browser interprets the content as code rather than data.

The bug in code

The whole CWE-79 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

ts
commentEl.innerHTML = comment.body;

Fixed

ts
commentEl.textContent = comment.body;

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Noroxi analysis

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Change log

  1. Fix✗ → ✓

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References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records