Is CVE-2019-16759 in the CISA KEV catalog?

Yes. CVE-2019-16759 is on the CISA Known Exploited Vulnerabilities list, added 2021-11-03.

What is the CVSS severity of CVE-2019-16759?

CVE-2019-16759 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2019-16759?

CVE-2019-16759 has an EPSS score of 99.73% (100th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2019-16759?

No published fix for CVE-2019-16759 has been found yet. It is on the CISA Known Exploited Vulnerabilities list; federal agencies must remediate by 2022-05-03. Apply the vendor's mitigations per CISA's guidance.

CVE & CISA-KEV Catalog

CVE-2019-16759

CRITICALCISA KEVEPSS 100th pctl

9.8

CVSS v3

NVD

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.

CWE-94Code Injection

How to fix

Actively exploited, no published fix found yet

CISA required action: Apply updates per vendor instructions.

Federal remediation due: 2022-05-03

Mitigation guidance may be in the linked vendor advisories in the References section below.

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CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

99.73%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

vBulletin PHP Module Remote Code Execution Vulnerability

The PHP module within vBulletin contains an unspecified vulnerability that allows for remote code execution via the widgetConfig[code] parameter in an ajax/render/widget_php routestring request.

Apply updates per vendor instructions.

Remediation due: 2022-05-03

References

Exploit9

Third-Party Advisory1

theregister.co.uk

Government Resource1

cisa.gov

Related Vulnerabilities

Other CWE-94 (Code Injection) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2017-9841	Critical	9.8	100%	KEV	Fix
CVE-2015-1635	Critical	9.8	100%	KEV	-
CVE-2022-22954	Critical	9.8	100%	KEV + Ransom	-
CVE-2025-3248	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2021-22204	Medium	6.8	100%	KEV	Fix
CVE-2012-0158	High	8.8	100%	KEV	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-07.