CVE-2021-48016
DedeCMS 5.8.1-beta Unauthenticated RCE via plus/flink.php
- State
- Published
- Severity
- 9.3 Critical
- Published
- Oct 22, 2026
- Updated
- Oct 29, 2026
- Reserved
- Oct 14, 2026
Description
DedeCMS through 5.8.1-beta contains a PHP code injection vulnerability in ShowMsg() where the HTTP Referer header is written into a DedeTemplate string and included. Unauthenticated attackers can send a crafted Referer to /plus/flink.php?dopost=save with an empty validate code to execute arbitrary PHP and system commands. Exploitation evidence was first observed by the Shadowserver Foundation on 2023-10-14.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.3 Critical | 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 | VulnCheck |
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-94 Improper Control of Generation of Code ('Code Injection')
Affected Products
| Product | Versions |
|---|---|
DedeCMSDedeCMS |
|
References
- Source Incite Blogtechnical-descriptionexploit
- DedeCMS v5.8.1 common.func.php ShowMsgtechnical-description
- Nuclei Templatetechnical-description
- VulnCheck Advisory: DedeCMS 5.8.1-beta Unauthenticated RCE via plus/flink.phpthird-party-advisory
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.