How severe is CVE-2026-34561?

CVE-2026-34561 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-2026-34561 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-34561?

CVE-2026-34561 affects Ci4-cms-erp Ci4ms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-34561?

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

Does CVE-2026-34561 have an EU (EUVD) identifier?

Yes. CVE-2026-34561 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18073.

When was CVE-2026-34561 published?

CVE-2026-34561 was published on 2026-04-01 and last updated on 2026-06-17.

CVE-2026-34561

CVE-2026-34561 is a medium-severity vulnerability in Ci4-cms-erp Ci4ms 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 4.7)
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-18073
Weakness: CWE-79
Affected product: Ci4-cms-erp Ci4ms
Published: 2026-04-01
Last modified: 2026-06-17

Description

CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to version 0.31.0.0, the application fails to properly sanitize user-controlled input within System Settings – Social Media Management. Multiple configuration fields, including Social Media and Social Media Link, accept attacker-controlled input that is stored server-side and later rendered without proper output encoding. This issue has been patched in version 0.31.0.0.

Frequently asked questions

What is CVE-2026-34561?: CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to version 0.31.0.0, the application fails to properly sanitize user-controlled input within System Settings – Social Media Management. Multiple configuration fields, including Social Media and Social Media Link, accept attacker-controlled input that is stored server-side and later rendered without proper output encoding. This issue has been patched in version 0.31.0.0.
How severe is CVE-2026-34561?: CVE-2026-34561 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-2026-34561 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-34561?: CVE-2026-34561 affects Ci4-cms-erp Ci4ms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-34561?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-34561 have an EU (EUVD) identifier?: Yes. CVE-2026-34561 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18073.
When was CVE-2026-34561 published?: CVE-2026-34561 was published on 2026-04-01 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ci4-cms-erp:ci4ms:*:*:*:*:*:*:*:*

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