Medium severity6.1NVD Advisory· Published Dec 23, 2025· Updated Jun 17, 2026

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Cmsimple/Cmsimple3 versions
cpe:2.3:a:cmsimple:cmsimple:5.4:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:cmsimple:cmsimple:5.4:*:*:*:*:*:*:*
- (no CPE)range: =5.4
- (no CPE)range: <=5.4

Patches

Vulnerability mechanics

References

www.exploit-db.com/exploits/50612nvdExploit
www.vulncheck.com/advisories/cmsimple-cross-site-scripting-via-html-unicode-encodingnvdThird Party Advisory
www.cmsimple.org/en/nvdProduct

News mentions

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