How severe is CVE-2023-50104?

CVE-2023-50104 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-50104 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-50104?

CVE-2023-50104 affects Zzcms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-50104?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2023-50104 published?

CVE-2023-50104 was published on 2023-12-29 and last updated on 2026-06-17.

CVE-2023-50104

CVE-2023-50104 is a critical-severity vulnerability in Zzcms with a CVSS 3.x base score of 9.8. 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-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Zzcms
Published: 2023-12-29
Last modified: 2026-06-17

Description

ZZCMS 2023 has a file upload vulnerability in 3/E_bak5.1/upload/index.php, allowing attackers to exploit this loophole to gain server privileges and execute arbitrary code.

Frequently asked questions

What is CVE-2023-50104?: ZZCMS 2023 has a file upload vulnerability in 3/E_bak5.1/upload/index.php, allowing attackers to exploit this loophole to gain server privileges and execute arbitrary code.
How severe is CVE-2023-50104?: CVE-2023-50104 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-50104 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-50104?: CVE-2023-50104 affects Zzcms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-50104?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-50104 published?: CVE-2023-50104 was published on 2023-12-29 and last updated on 2026-06-17.

References

https://github.com/zzq66/cve4

Affected products (1)

cpe:2.3:a:zzcms:zzcms:2023:*:*:*:*:*:*:*

More vulnerabilities in Zzcms

CVE-2025-22957 — Critical (CVSS 9.8): A SQL injection vulnerability exists in the front-end of the website in ZZCMS <= 2023, which can be exploited without…
CVE-2024-52724 — Critical (CVSS 9.8): ZZCMS 2023 was discovered to contain a SQL injection vulnerability in /q/show.php.
CVE-2023-42398 — Critical (CVSS 9.8): An issue in zzCMS v.2023 allows a remote attacker to execute arbitrary code and obtain sensitive information via the…
CVE-2019-12351 — Critical (CVSS 9.8): An issue was discovered in zzcms 2019. SQL Injection exists in dl/dl_print.php via an id parameter value with a…
CVE-2019-12350 — Critical (CVSS 9.8): An issue was discovered in zzcms 2019. SQL Injection exists in dl/dl_download.php via an id parameter value with a…
CVE-2019-12349 — Critical (CVSS 9.8): An issue was discovered in zzcms 2019. SQL Injection exists in /admin/dl_sendsms.php via the id parameter.

All CVEs affecting Zzcms →

Other CWE-434 (Unrestricted Upload of File with Dangerous Type) vulnerabilities

CVE-2026-48283 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Unrestricted Upload of File with Dangerous Type…
CVE-2026-48276 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Unrestricted Upload of File with Dangerous Type…
CVE-2026-57700 — Critical (CVSS 10.0): Unrestricted Upload of File with Dangerous Type vulnerability in Daan.Dev OMGF Pro allows Using Malicious Files. This…
CVE-2025-69129 — Critical (CVSS 10.0): Unauthenticated Arbitrary File Upload in WordPress & WooCommerce Scraper Plugin, Import Data from Any Site <= 1.0.7…
CVE-2026-40772 — Critical (CVSS 10.0): Unauthenticated Arbitrary File Upload in GeekyBot <= 1.2.2 versions.
CVE-2026-40412 — Critical (CVSS 10.0): Unrestricted upload of file with dangerous type in Azure Orbital Spatio allows an unauthorized attacker to execute code…

Browse all CWE-434 (Unrestricted Upload of File with Dangerous Type) vulnerabilities →