CVE-2021-47737

CSZ CMS 1.2.7 HTML Injection Vulnerability via Member Dashboard

Medium5.1Public exploitEPSS 0.28%

Published: 23 Dec 2025
Updated: 7 Apr 2026
Reserved: 23 Dec 2025
Assigned by: VulnCheck

Description

CSZ CMS 1.2.7 contains an HTML injection vulnerability that allows authenticated users to insert malicious hyperlinks in message titles. Attackers can craft POST requests to the member messaging system with HTML-based links to potentially conduct phishing or social engineering attacks.

Public exploit

A reference of the record is tagged as an exploit or proof of concept: anyone can try it against an unpatched system. CISA's SSVC rates its exploitation: a proof of concept is public.

ExploitDB-48357 (opens in a new tab)exploit

Timeline

2025
23 Dec 2025
23 Dec 2025
ID reserved
By VulnCheck
23 Dec 2025
23 Dec 2025
Published
2026
7 Apr 20264 months later
7 Apr 2026· 4 months later
Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2021-47737, by who scored it
Scored by	CVSS	Score	Vector
VulnCheckCNA (assigner)	4.0	Medium5.1	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
VulnCheckCNA (assigner)	3.1	Medium5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
NVDNVD · Analyzed	4.0	Medium5.1	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS (exploitation in 30 days): 0.28% · top 80% of all CVEs (7 Nov 2026)
CISA SSVC: Exploitation: poc · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.1.

Weakness

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (opens in a new tab)All about CWE-79 and its CVEs

Affected products

Cszcms · CSZ CMS
- affected 1.2.7

References (4)

ExploitDB-48357 (opens in a new tab)exploit
Official CSZ CMS Vendor Homepage (opens in a new tab)product
CSZ CMS SourceForge Project (opens in a new tab)product
VulnCheck Advisory: CSZ CMS 1.2.7 HTML Injection Vulnerability via Member Dashboard (opens in a new tab)third-party-advisory

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

[![CVE-2021-47737](https://trackcve.app/badge/CVE-2021-47737.svg)](https://trackcve.app/cve/CVE-2021-47737)

Record last updated 7 Apr 2026, 14:05 UTC.