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DeDeCMS CVE-2026-76783

| EUVDEUVD-2026-63187 MEDIUM
SQL Injection (CWE-89)
2026-08-20 VulDB GHSA-295h-2wxv-92gx
SQLi PHP Dedecms
5.5
CVSS 4.0 · Vendor: VulDB
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Severity by source

Vendor (VulDB) PRIMARY
5.5 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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
7.3 HIGH

Network-reachable with no authentication or user interaction; scope unchanged; low CIA impact consistent with partial database exposure without full system compromise.

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

Primary rating from Vendor (VulDB).

CVSS VectorVendor: VulDB

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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
None
User Interaction
None
Scope
X

Lifecycle Timeline

3
CVSS changed
Aug 20, 2026 - 01:22 NVD
6.9 (MEDIUM) 5.5 (MEDIUM)
Analysis Generated
Aug 20, 2026 - 00:44 vuln.today
CVE Published
Aug 20, 2026 - 00:15 cve.org
MEDIUM 6.9

DescriptionCVE.org

A security vulnerability has been detected in DeDeCMS 53_1_UTF8. This vulnerability affects unknown code of the file /plus/advancedsearch.php. Such manipulation of the argument sql leads to sql injection. The attack can be launched remotely. The exploit has been disclosed publicly and may be used.

AnalysisAI

SQL injection in DeDeCMS 53_1_UTF8 exposes the /plus/advancedsearch.php endpoint to remote unauthenticated database manipulation via an unsanitized sql argument. The flaw (CWE-89) allows attackers to craft malicious SQL statements that interact directly with the backend database, yielding limited but real confidentiality, integrity, and availability impact. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Send HTTP request to /plus/advancedsearch.php
Delivery
Inject SQL payload into `sql` parameter
Exploit
Backend executes attacker-controlled SQL
Execution
Enumerate database schema and extract credential hashes
Impact
Use harvested credentials for further access
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Vulnerability AssessmentAI

Exploitation The DeDeCMS advanced search feature must be deployed and its endpoint `/plus/advancedsearch.php` must be publicly reachable over HTTP/HTTPS - no authentication is required (PR:N confirmed by CVSS 4.0 vector). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 base score of 6.9 with vector AV:N/AC:L/AT:N/PR:N/UI:N reflects a highly accessible attack profile - network reachable, low complexity, no authentication, no user interaction required. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario A remote unauthenticated attacker sends a crafted HTTP request to a publicly exposed `/plus/advancedsearch.php` endpoint with a malicious value in the `sql` parameter - for example, a UNION-based payload to enumerate database table names and extract credential hashes. A public exploit has been disclosed via Feishu (https://uvxbywu62qm.feishu.cn/wiki/X1T5w8jPUinAsVkM0bhcZf4XnHe), and automated tools such as sqlmap can operationalize this attack with minimal configuration, enabling rapid exploitation across internet-exposed DeDeCMS instances.
Remediation No vendor-released patch has been identified at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-76783 vulnerability details – vuln.today
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