CVE-2020-26295Network attack vector

Administrator code execution via unchecked layout callback

Published Jan 21, 2021 · Updated Aug 4, 2024

Code execution in OpenMage LTS before 19.4.10 and 20.0.0 through 20.0.5 allows remote authenticated users to write executable files. The unsetCallChild layout action invokes a caller-supplied block callback without applying the blacklist that blocks fetchView and render. An administrator needs both import/export and CMS-page editing permissions; exploitation writes and loads server-side code.

CVSS severity8.7
High
EPSS probability1.78%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code execution in OpenMage LTS before 19.4.10 and 20.0.0 through 20.0.5 allows remote authenticated users to write executable files. The unsetCallChild layout action invokes a caller-supplied block callback without applying the blacklist that blocks fetchView and render. An administrator needs both import/export and CMS-page editing permissions; exploitation writes and loads server-side code.

The record

CVE
CVE-2020-26295
Published
Jan 21, 2021
Updated
Aug 4, 2024
Vendor
OpenMage
Product
OpenMage LTS
Classifications
CWE-22, CWE-434, T1505.003
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jan 21, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record 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=< 19.4.10
  2. Affected versionversion=>= 20.0.0, < 20.0.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

OpenMage · OpenMage LTSversion=< 19.4.10; version=>= 20.0.0, < 20.0.6

Published CVSS scores

7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P
8.7GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A: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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-434Unrestricted Upload of File with Dangerous Type
T1505.003Web Shell

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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