CVE-2026-32870Network attack vector

Downstream XML manipulation via partial CDATA validation

Published Apr 24, 2026 · Updated Apr 24, 2026

XML injection in Content Folder Kirby before 4.9.0 and 5.0.0 through 5.3.3 allows attackers to alter downstream XML processing. Xml::value() treats a string containing valid CDATA as safe and passes structured XML outside that block without escaping it. Exploitation requires site or plugin code to pass attacker-controlled data into an affected XML helper and a downstream system to act on the generated schema.

CVSS severity6.9
Medium
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XML injection in Content Folder Kirby before 4.9.0 and 5.0.0 through 5.3.3 allows attackers to alter downstream XML processing. Xml::value() treats a string containing valid CDATA as safe and passes structured XML outside that block without escaping it. Exploitation requires site or plugin code to pass attacker-controlled data into an affected XML helper and a downstream system to act on the generated schema.

The record

CVE
CVE-2026-32870
Published
Apr 24, 2026
Updated
Apr 24, 2026
Vendor
Content Folder
Product
Kirby
Classifications
CWE-91, CAPEC-250
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 4.9.0
  2. Affected versionversion=>= 5.0.0, < 5.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Content Folder · Kirbyversion=< 4.9.0; version=>= 5.0.0, < 5.4.0

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
6.9GitHub, Inc.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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-91XML Injection (aka Blind XPath Injection)
CAPEC-250XML Injection

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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