Every website running a popular Chinese content management framework may be sitting on an unlocked vault — and the key has just been handed to the internet.
Who's at Risk — and Why It Matters
The vulnerability, tracked as CVE-2026-6562, lives inside dameng100 muucmf, a PHP-based web content management framework used to build and run websites, portals, and web applications — particularly across East Asian developer communities. While precise install counts are not publicly audited, the project is actively distributed via open-source repositories and is embedded in real production websites handling user data, logins, and commerce.
If your website, your favorite local business's site, or your company's web portal was built on muucmf version 1.9.5.20260309 or earlier, the people who maintain it may be completely unaware that an attacker sitting anywhere on the planet could already be reading — or copying — your personal information, passwords, private messages, or payment records. No account. No password. No special access required.
What the Attacker Actually Does — In Plain English
Imagine the search box on a website. You type in a product name, a news topic, or a username, and the website goes and looks it up in its database. That's normal. What's not normal is when the website blindly trusts whatever you type and passes it directly into the database engine — like a librarian who reads your note out loud to a vault that opens for anyone who uses the right magic words.
That is exactly what's happening here. The search feature on muucmf-powered websites takes whatever is typed into the keyword field and feeds it — without checking or sanitizing it — straight into a database query. An attacker can craft a specially shaped search term that tricks the database into executing unintended commands. Instead of just searching for "blue shoes," they're essentially whispering instructions to the database: "And while you're at it, show me every username and password you have stored." The database, having no reason to distrust the instruction, complies.
The entire attack can be carried out remotely, over a standard web browser, with no login or special privileges needed. Public exploit code for this exact vulnerability has already been released — meaning the barrier to carrying out an attack is essentially zero. Automated scanning tools can find vulnerable sites and exploit them within minutes of a campaign starting.
The Technical Detail Security Teams Need
The root cause is an unsanitized parameter injection in the getListByPage() function, located at the route /index/Search/index.html. The keyword argument is interpolated directly into a back-end SQL query with no prepared statement binding or input escaping applied. This is a classic CWE-89 (SQL Injection) vulnerability, scored at CVSS 7.3 (HIGH). Because it is reachable through a public-facing endpoint with no authentication gate, the attack surface is maximally exposed. Exploitation can yield full database read access and, depending on database user permissions, may extend to file system read/write operations or even remote command execution on misconfigured hosts.
How It Was Discovered — and What's Been Done About It
The vulnerability was responsibly disclosed to the vendor, dameng100, before going public. However, according to the disclosure record, the vendor did not respond in any way. That silence is significant. It means no official patch has been issued, no advisory has been published by the developer, and anyone running this software has received no warning from the people who wrote it.
The exploit has since been made public. As of now, no confirmed active exploitation campaigns have been reported in the wild — but that window closes fast once working exploit code is freely available. Security researchers and opportunistic attackers alike now have everything they need to scan for and hit vulnerable installations. The clock is running.
What You Should Do Right Now
If you run, maintain, or have built a website on dameng100 muucmf, take these three steps immediately:
-
Audit and block the vulnerable endpoint. At your web server or firewall level, restrict or disable public access to
/index/Search/index.htmluntil a patched version is available. If your site's search functionality goes offline temporarily, that is an acceptable trade-off given the severity. Use your web application firewall (WAF) to block requests to this path containing SQL metacharacters such as',--,;, orUNION SELECTpatterns. -
Check your database logs immediately. Look for unusual or malformed queries originating from the search function — specifically any
SELECTstatements being passed through user-facing inputs. Tools like OWASP ZAP or even basic database audit logs can help surface whether you have already been probed or compromised. If you find evidence of intrusion, treat all stored credentials as compromised and force a password reset. - Move to a patched or alternative version as soon as one is available. Monitor the official muucmf repository for any release beyond version 1.9.5.20260309 that addresses CVE-2026-6562. If the vendor remains unresponsive, seriously evaluate migrating to an actively maintained framework. A CMS whose developer ignores security disclosures is a liability that compound over time. Subscribe to the NVD vulnerability feed to get notified the moment a patch drops.
CVE: CVE-2026-6562 | CVSS: 7.3 HIGH | Affected Version: dameng100 muucmf 1.9.5.20260309 | Vulnerability Class: SQL Injection (CWE-89) | Exploit Status: Publicly available