CVE-2021-47733

Description

CMSimple 5.4 contains a cross-site scripting vulnerability that allows attackers to bypass input filtering by using HTML to Unicode encoding. Attackers can inject malicious scripts by encoding payloads like ')-alert(1)// and execute arbitrary JavaScript when victims interact with delete buttons.

CVSS v3.1 Score

6.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

Affected Products

Vendor	Product	Versions
cmsimple	cmsimple	All

References

Exploits

https://www.exploit-db.com/exploits/50612

Other References

https://www.cmsimple.org/en/ https://www.vulncheck.com/advisories/cmsimple-cross-site-scripting-via-html-unicode-encoding

Frequently Asked Questions

What is CVE-2021-47733? +

CMSimple 5.4 contains a cross-site scripting vulnerability that allows attackers to bypass input filtering by using HTML to Unicode encoding. Attackers can inject malicious scripts by encoding payloads like ')-alert(1)// and execute arbitrary JavaScript when victims interact with delete buttons. It has a CVSS v3.1 base score of 6.1 (MEDIUM).

How severe is CVE-2021-47733? +

CVE-2021-47733 has a CVSS v3.1 score of 6.1 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2021-47733? +

CVE-2021-47733 affects products from cmsimple, specifically: cmsimple. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2021-47733? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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