How severe is CVE-2016-8581?

CVE-2016-8581 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2016-8581 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 17% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-8581?

CVE-2016-8581 primarily affects Alienvault Open Source Security Information And Event Management. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-8581?

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

When was CVE-2016-8581 published?

CVE-2016-8581 was published on 2016-10-28 and last updated on 2026-06-17.

CVE-2016-8581

CVE-2016-8581 is a medium-severity vulnerability in Alienvault Open Source Security Information And Event Management with a CVSS 3.x base score of 6.1. Its EPSS exploit-prediction score of 17% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 17% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Alienvault Open Source Security Information And Event Management
Published: 2016-10-28
Last modified: 2026-06-17

Description

A persistent XSS vulnerability exists in the User-Agent header of the login process of AlienVault OSSIM and USM before 5.3.2 that allows an attacker to steal session IDs of logged in users when the current sessions are viewed by an administrator.

Frequently asked questions

What is CVE-2016-8581?: A persistent XSS vulnerability exists in the User-Agent header of the login process of AlienVault OSSIM and USM before 5.3.2 that allows an attacker to steal session IDs of logged in users when the current sessions are viewed by an administrator.
How severe is CVE-2016-8581?: CVE-2016-8581 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2016-8581 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 17% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-8581?: CVE-2016-8581 primarily affects Alienvault Open Source Security Information And Event Management. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-8581?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2016-8581 published?: CVE-2016-8581 was published on 2016-10-28 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:alienvault:open_source_security_information_and_event_management:*:*:*:*:*:*:*:*
cpe:2.3:a:alienvault:unified_security_management:*:*:*:*:*:*:*:*

More vulnerabilities in Alienvault Open Source Security Information And Event Management

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