PT-2025-52833 · Cmsimple · Cmsimple

Heinjame · Published 2025-12-23 · Updated 2025-12-23 · CVE-2021-47733

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions CMSimple version 5.4

Description The software contains a cross-site scripting issue that allows attackers to bypass input filtering. This is achieved by using HTML to Unicode encoding, enabling the injection of malicious scripts. Attackers can inject payloads, such as ')-alert(1)//', to execute arbitrary JavaScript when victims interact with delete buttons.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2021-47733

Affected Products

Cmsimple

References · 6

• 🔥 https://exploit-db.com/exploits/50612 · Exploit
• https://osv.dev/vulnerability/CVE-2021-47733 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-47733 · Security Note
• https://twitter.com/CVEnew/status/2003567279116624301 · Twitter Post
• https://vulncheck.com/advisories/cmsimple-cross-site-scripting-via-html-unicode-encoding · Note
• https://cmsimple.org/en · Note