How severe is CVE-2016-5661?

CVE-2016-5661 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2016-5661 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-5661?

CVE-2016-5661 affects Accela Civic Platform Citizen Access Portal. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-5661?

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

When was CVE-2016-5661 published?

CVE-2016-5661 was published on 2016-07-15 and last updated on 2026-06-17.

CVE-2016-5661

CVE-2016-5661 is a high-severity vulnerability in Accela Civic Platform Citizen Access Portal with a CVSS 3.x base score of 8.8. 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-284.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 3% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-284
Affected product: Accela Civic Platform Citizen Access Portal
Published: 2016-07-15
Last modified: 2026-06-17

Description

Accela Civic Platform Citizen Access portal relies on the client to restrict file types for uploads, which allows remote authenticated users to execute arbitrary code via modified _EventArgument and filename parameters.

Frequently asked questions

What is CVE-2016-5661?: Accela Civic Platform Citizen Access portal relies on the client to restrict file types for uploads, which allows remote authenticated users to execute arbitrary code via modified _EventArgument and filename parameters.
How severe is CVE-2016-5661?: CVE-2016-5661 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2016-5661 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-5661?: CVE-2016-5661 affects Accela Civic Platform Citizen Access Portal. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-5661?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2016-5661 published?: CVE-2016-5661 was published on 2016-07-15 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:accela:civic_platform_citizen_access_portal:-:*:*:*:*:*:*:*

Other CWE-284 (Improper Access Control) vulnerabilities

CVE-2026-50746 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit an Improper Access Control vulnerability found in UniFi…
CVE-2026-46978 — Critical (CVSS 10.0): Vulnerability in the Oracle Solaris product of Oracle Systems (component: Remote Administration Daemon). The…
CVE-2026-35308 — Critical (CVSS 10.0): Vulnerability in the Oracle Coherence product of Oracle Fusion Middleware (component: Centralized Third Party Jars).…
CVE-2026-35307 — Critical (CVSS 10.0): Vulnerability in the Oracle Coherence product of Oracle Fusion Middleware (component: Core). Supported versions that…
CVE-2026-46695 — Critical (CVSS 10.0): Boxlite is a sandbox service that allows users to create lightweight virtual machines (Boxes) and launch OCI containers…
CVE-2026-46840 — Critical (CVSS 10.0): Vulnerability in Oracle REST Data Services (component: Backend-as-a-Service). Supported versions that are affected are…

Browse all CWE-284 (Improper Access Control) vulnerabilities →