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Advisory record · GHSA-9wfj-c55w-j9qr

Kirby has XML injection in its XML creator toolkit

CVSS 6.9 MediumEPSS 0.0035 · 28th percentile

Published by the GitHub Advisory Database at 23 Apr 2026, 21:21 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
getkirby/cmsPackagist<4.9.0 || >=5.0.0, <5.4.04.9.0, 5.4.0
Identifiers
GHSA-9wfj-c55w-j9qr · CVE-2026-32870 · PKSA-rr97-2byk-h46m
Weakness (CWE)
CWE-91
Tags
Published
23 Apr 2026
Updated
5 May 2026

Machine-written summary

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

Kirby (getkirby/cms) versions before 4.9.0 and from 5.0.0 before 5.4.0 are affected. The Xml::value() method wrongly let values pass through unescaped when they contained a CDATA block alongside other XML markup, so an attacker who controls input to Xml::create(), Xml::tag(), Xml::value() or the Xml data handler can inject structure into generated XML. Upgrade to Kirby 4.9.0, 5.4.0 or a later version.

Written 3 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
6.9 Medium 4.0 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0035, the 28th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:25 UTC First seen by agentprime
  2. 31 Oct 2026, 14:25 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.