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Dromara UJCMS CVE-2026-78140

| EUVDEUVD-2026-64664 LOW
Improper Neutralization of Special Elements Used in a Template Engine (CWE-1336)
2026-08-23 VulDB GHSA-m2hx-w98g-mrrp
Ssti Information Disclosure Java Ujcms
2.0
CVSS 4.0 · Vendor: VulDB

Severity by source

Vendor (VulDB) PRIMARY
2.0 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
8.7 HIGH

Network-reachable backend API requires high admin privileges; FreeMarker SSTI can traverse JVM reflection to achieve OS-level code execution, constituting scope change; availability impact not confirmed from PoC or description.

3.1 AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
4.0 AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N

Primary rating from Vendor (VulDB).

CVSS VectorVendor: VulDB

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
X

Lifecycle Timeline

4
Severity Changed
Aug 23, 2026 - 20:22 NVD
MEDIUM LOW
CVSS changed
Aug 23, 2026 - 20:22 NVD
5.1 (MEDIUM) 2.0 (LOW)
Analysis Generated
Aug 23, 2026 - 20:22 vuln.today
CVE Published
Aug 23, 2026 - 19:45 cve.org
MEDIUM 5.1

DescriptionCVE.org

A flaw has been found in Dromara UJCMS up to 10.1.3. The impacted element is the function update of the file src/main/java/com/ujcms/cms/ext/web/backendapi/WebFileTemplateController.java of the component web-file-template Endpoint. Executing a manipulation can lead to improper neutralization of special elements used in a template engine. The attack can be launched remotely. The exploit has been published and may be used.

AnalysisAI

Server-side template injection (SSTI) via the FreeMarker engine in Dromara UJCMS 10.1.0 through 10.1.3 allows authenticated backend administrators to inject malicious template directives through the web-file-template update API endpoint. Exploitation requires high-privilege backend credentials but is network-reachable with no user interaction, and a public proof-of-concept exploit has been published on GitHub demonstrating the attack path. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Obtain or compromise UJCMS backend admin credentials
Delivery
Authenticate to CMS backend admin interface
Exploit
Send crafted FreeMarker SSTI payload to web-file-template update endpoint
Execution
Template engine renders injected directives without sanitization
Persist
Access JVM internals via FreeMarker reflection APIs
Impact
Exfiltrate sensitive data or execute arbitrary OS commands
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Vulnerability AssessmentAI

Exploitation Exploitation requires an authenticated session with high-privilege backend administrator access to the UJCMS application - this is the single most significant limiting factor. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 base score of 5.1 (AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P) positions this as a moderate-severity finding, with the high privilege requirement (PR:H) being the dominant risk-reducing factor. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker who has obtained backend administrator credentials - through phishing, credential stuffing, or insider access - authenticates to the UJCMS backend interface and submits a crafted FreeMarker template payload via the web-file-template update API endpoint. The CMS passes the attacker-controlled content to the FreeMarker engine without sanitizing dangerous directives, enabling the attacker to enumerate server-side environment variables, read sensitive configuration files, or invoke Java runtime methods to execute operating system commands. …
Remediation No vendor-released patch has been identified in the available intelligence - patch availability should be confirmed directly with the Dromara UJCMS project repository. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-78140 vulnerability details – vuln.today
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