How severe is CVE-2019-16759?

CVE-2019-16759 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-2019-16759 being actively exploited?

Yes. CVE-2019-16759 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2021-11-03, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2019-16759?

CVE-2019-16759 affects Vbulletin. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-16759?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2019-16759 have an EU (EUVD) identifier?

Yes. CVE-2019-16759 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2019-7294. It is also flagged as exploited in the EUVD (since 2021-11-03).

When was CVE-2019-16759 published?

CVE-2019-16759 was published on 2019-09-24 and last updated on 2026-06-17.

CVE-2019-16759

CVE-2019-16759 is a critical-severity vulnerability in Vbulletin with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2021-11-03). The underlying weakness is classified as CWE-94.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 100% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2021-11-03)
EU (EUVD) id: EUVD-2019-7294
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2021-11-03)
Weakness: CWE-94
Affected product: Vbulletin
Published: 2019-09-24
Last modified: 2026-06-17

Description

vBulletin 5.x through 5.5.4 allows remote command execution via the widgetConfig[code] parameter in an ajax/render/widget_php routestring request.

Frequently asked questions

What is CVE-2019-16759?: vBulletin 5.x through 5.5.4 allows remote command execution via the widgetConfig[code] parameter in an ajax/render/widget_php routestring request.
How severe is CVE-2019-16759?: CVE-2019-16759 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-2019-16759 being actively exploited?: Yes. CVE-2019-16759 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2021-11-03, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2019-16759?: CVE-2019-16759 affects Vbulletin. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-16759?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2019-16759 have an EU (EUVD) identifier?: Yes. CVE-2019-16759 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2019-7294. It is also flagged as exploited in the EUVD (since 2021-11-03).
When was CVE-2019-16759 published?: CVE-2019-16759 was published on 2019-09-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:vbulletin:vbulletin:*:*:*:*:*:*:*:*

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