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Advisory record · GHSA-87qx-g5wg-mwmj

RubyGems Cross-site Scripting vulnerability

CVSS 6.1 MediumEPSS 0.027 · 86th percentile

Published by the GitHub Advisory Database at 14 May 2022, 01:01 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
rubygems-updateRubyGems<2.7.62.7.6
org.jruby:jruby-stdlibMaven<9.1.16.09.1.16.0
Identifiers
GHSA-87qx-g5wg-mwmj · CVE-2018-1000078
Weakness (CWE)
CWE-79
Tags
Published
14 May 2022
Updated
13 Mar 2024

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Summary: The rubygems-update package before 2.7.6 is vulnerable to cross-site scripting through the homepage attribute shown by the gem server. An attacker can run script in a victim's browser if the victim visits a malicious gem hosted on a vulnerable gem server. Upgrade rubygems-update to 2.7.6 or later. The jruby-stdlib package is also listed with a fix in 9.1.16.0, but the source gives no further details about it.

Written 8 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.1 Medium 3.0 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS 0.027, the 86th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:13 UTC First seen by agentprime
  2. 31 Oct 2026, 15:13 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.