Vulnerability · CVE-2021-47737
CSZ CMS 1.2.7 contains an HTML injection vulnerability that allows authenticated users to insert malicious hyperlinks in message titles.
Published Dec 23, 2025 · catalog updated Apr 7, 2026 · CSZ CMS
Last checked Nov 2, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2021-47737. EPSS is 0.28%. Act only if a listed version of CSZ CMS is installed.
Gaps on this record
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
Same product and reporting
- CVE-2021-47738 · Medium
- Severity
- Medium5.1
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.28%
- Remediation
- Vendor / distro source
- Affected products
- vendor cszcms CSZ CMS 1.2.7
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.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor cszcms CSZ CMS 1.2.71.2.7
How to fix CVE-2021-47737
No stored fix
No vendor fix text is stored. Use the linked advisory before you change production.
Version check
Seen in 1.2.7
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2021-47737. EPSS is 0.28%. Act only if a listed version of CSZ CMS is installed.
Which versions are affected?
Compare what you have installed with cszcms CSZ CMS 1.2.7 1.2.7. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 0.28%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Dec 23, 2025 · EUVD
Detected
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.
Apr 7, 2026 · EUVD
Updated
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.
Sources
- CVE.orgVulnerability recordCVE-2021-47737
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2021-47737
30-day exploitation probability 0.28%
first.org - EUVDVulnerability recordEUVD-2025-204829
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 at
euvd.enisa.europa.eu
References
Freshness
Last verified in this catalog Nov 2, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- FIRST EPSSNov 2, 2026
- CVE.orgOct 30, 2026
- EUVDOct 30, 2026