How severe is CVE-2025-3123?

CVE-2025-3123 has a CVSS 3.x base score of 4.7, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2025-3123 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-3123?

CVE-2025-3123 affects Wondercms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-3123?

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

Does CVE-2025-3123 have an EU (EUVD) identifier?

Yes. CVE-2025-3123 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-9620.

When was CVE-2025-3123 published?

CVE-2025-3123 was published on 2025-04-02 and last updated on 2026-06-17.

CVE-2025-3123

CVE-2025-3123 is a medium-severity vulnerability in Wondercms with a CVSS 3.x base score of 4.7. 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: Medium (CVSS 3.x base score 4.7)
CVSS v2: 5.8
CVSS v4: 5.1
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-9620
Weakness: CWE-434
Affected product: Wondercms
Published: 2025-04-02
Last modified: 2026-06-17

Description

A vulnerability, which was classified as critical, has been found in WonderCMS 3.5.0. Affected by this issue is the function installUpdateModuleAction of the component Theme Installation/Plugin Installation. The manipulation leads to unrestricted upload. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The real existence of this vulnerability is still doubted at the moment. The vendor explains, that "[t]he philosophy has always been, admin [...] bear responsibility to not install themes/plugins from untrusted sources."

Frequently asked questions

What is CVE-2025-3123?: A vulnerability, which was classified as critical, has been found in WonderCMS 3.5.0. Affected by this issue is the function installUpdateModuleAction of the component Theme Installation/Plugin Installation. The manipulation leads to unrestricted upload. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The real existence of this vulnerability is still doubted at the moment. The vendor explains, that "[t]he philosophy has always been, admin [...] bear responsibility to not install themes/plugins from untrusted sources."
How severe is CVE-2025-3123?: CVE-2025-3123 has a CVSS 3.x base score of 4.7, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2025-3123 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-3123?: CVE-2025-3123 affects Wondercms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-3123?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-3123 have an EU (EUVD) identifier?: Yes. CVE-2025-3123 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-9620.
When was CVE-2025-3123 published?: CVE-2025-3123 was published on 2025-04-02 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:wondercms:wondercms:3.5.0:*:*:*:*:*:*:*

More vulnerabilities in Wondercms

CVE-2020-35314 — Critical (CVSS 9.8): A remote code execution vulnerability in the installUpdateThemePluginAction function in index.php in WonderCMS 3.1.3,…
CVE-2020-35313 — Critical (CVSS 9.8): A server-side request forgery (SSRF) vulnerability in the addCustomThemePluginRepository function in index.php in…
CVE-2014-8705 — Critical (CVSS 9.8): PHP remote file inclusion vulnerability in editInplace.php in Wonder CMS 2014 allows remote attackers to execute…
CVE-2014-8704 — Critical (CVSS 9.8): Directory traversal vulnerability in index.php in Wonder CMS 2014 allows remote attackers to include and execute…
CVE-2024-32340 — Critical (CVSS 9.6): A cross-site scripting (XSS) vulnerability in the Settings section of WonderCMS v3.4.3 allows attackers to execute…
CVE-2018-14387 — High (CVSS 8.8): An issue was discovered in WonderCMS before 2.5.2. An attacker can create a new session on a web application and record…

All CVEs affecting Wondercms →

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 →