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CVE-2026-12257

CRITICAL
9.3
CVSS 4.0
Description
Versions of Mura CMS prior to 10.0.712 contain a critical remote code execution (RCE) vulnerability. The flaw is located in the endpoint “/index.cfm/_api/json/v1/default”, where the “method” parameter in POST requests is not properly validated or sanitised before being processed by the ColdFusion engine. As a result, a remote attacker could exploit this vulnerability to inject and execute arbitrary CFML (ColdFusion Markup Language) expressions and instantiate malicious Java objects, thereby compromising the system’s security.

Metadata

CVE ID
CVE-2026-12257
State
PUBLISHED
Assigner
INCIBE
Reserved
2026-06-15 09:03 UTC
Published
2026-07-13 11:29 UTC
Last updated
2026-07-13 13:06 UTC
Primary CWE
CWE-94
CWE-94 Improper Control of Generation of Code ('Code Injecti…
Vendor / Product
Mura Software / CMS
Sources
cve.org  ·  NVD

Severity & Metrics

9.3 CRITICAL CVSS 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
SSVC — CISA Coordinator
Exploitation
none
Automatable
yes
Tech. Impact
total
Affected products (1)
VendorProductPlatformVersions
Mura Software CMS — 10.0.712
Weakness (CWE)
CWESourceDescription
CWE-94 cna CWE-94 Improper Control of Generation of Code ('Code Injection')
CVSS scores (1)
ScoreSeverityVersionSourceVector
9.3 CRITICAL 4.0 cna CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
References (1)
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