CVE-2026-74992Network attack vector

Arbitrary file upload via font ZIP extraction

Published Aug 20, 2026 · Updated Aug 20, 2026

Arbitrary file upload in Themeum Kirki before 6.2.3 allows remote authenticated users to place web files via font ZIP uploads. The custom-font upload feature accepts user-supplied webfont ZIP archives, extracts them into a web-accessible directory, does not adequately validate the archived file set, and does not remove disallowed extracted files after unpacking. Editor-role access is required; the resulting exposure is stored XSS from uploaded web content, and some server configurations can also execute uploaded files as code.

CVSS severity6.8
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Arbitrary file upload in Themeum Kirki before 6.2.3 allows remote authenticated users to place web files via font ZIP uploads. The custom-font upload feature accepts user-supplied webfont ZIP archives, extracts them into a web-accessible directory, does not adequately validate the archived file set, and does not remove disallowed extracted files after unpacking. Editor-role access is required; the resulting exposure is stored XSS from uploaded web content, and some server configurations can also execute uploaded files as code.

The record

CVE
CVE-2026-74992
Published
Aug 20, 2026
Updated
Aug 20, 2026
Vendor
Themeum
Product
Kirki
Classifications
CWE-79
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 20, 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=0 <6.2.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Themeum · Kirkiversion=0 <6.2.3

Published CVSS scores

6.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

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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