How severe is CVE-2021-47737?

CVE-2021-47737 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-47737 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-47737?

CVE-2021-47737 affects Cszcms Csz Cms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-47737?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2021-47737 have an EU (EUVD) identifier?

Yes. CVE-2021-47737 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204829.

When was CVE-2021-47737 published?

CVE-2021-47737 was published on 2025-12-23 and last updated on 2026-06-17.

CVE-2021-47737

CVE-2021-47737 is a medium-severity vulnerability in Cszcms Csz Cms with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v4: 5.1
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-204829
Weakness: CWE-79
Affected product: Cszcms Csz Cms
Published: 2025-12-23
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-47737?: 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.
How severe is CVE-2021-47737?: CVE-2021-47737 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-47737 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-47737?: CVE-2021-47737 affects Cszcms Csz Cms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-47737?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2021-47737 have an EU (EUVD) identifier?: Yes. CVE-2021-47737 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204829.
When was CVE-2021-47737 published?: CVE-2021-47737 was published on 2025-12-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:cszcms:csz_cms:1.2.7:*:*:*:*:*:*:*

More vulnerabilities in Cszcms Csz Cms

CVE-2024-25414 — Critical (CVSS 9.8): An arbitrary file upload vulnerability in /admin/upgrade of CSZ CMS v1.3.0 allows attackers to execute arbitrary code…
CVE-2022-27165 — Critical (CVSS 9.8): CSZ CMS 1.2.2 is vulnerable to SQL Injection via cszcms_admin_Plugin_manager_setstatus
CVE-2022-27164 — Critical (CVSS 9.8): CSZ CMS 1.2.2 is vulnerable to SQL Injection via cszcms_admin_Users_viewUsers
CVE-2022-27163 — Critical (CVSS 9.8): CSZ CMS 1.2.2 is vulnerable to SQL Injection via cszcms_admin_Users_editUser
CVE-2022-27162 — Critical (CVSS 9.8): CSZ CMS 1.2.2 is vulnerable to SQL Injection via cszcms_admin_Members_editUser
CVE-2022-27161 — Critical (CVSS 9.8): Csz Cms 1.2.2 is vulnerable to SQL Injection via cszcms_admin_Members_viewUsers

All CVEs affecting Cszcms Csz Cms →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →