How severe is CVE-2019-11574?

CVE-2019-11574 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-2019-11574 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-11574?

CVE-2019-11574 affects Simplemachines Simple Machine Forum. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-11574?

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

When was CVE-2019-11574 published?

CVE-2019-11574 was published on 2020-03-20 and last updated on 2026-06-17.

CVE-2019-11574

CVE-2019-11574 is a critical-severity vulnerability in Simplemachines Simple Machine Forum with a CVSS 3.x base score of 9.8. 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-918.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-918
Affected product: Simplemachines Simple Machine Forum
Published: 2020-03-20
Last modified: 2026-06-17

Description

An issue was discovered in Simple Machines Forum (SMF) before release 2.0.17. There is SSRF related to Subs-Package.php and Subs.php because user-supplied data is used directly in curl calls.

Frequently asked questions

What is CVE-2019-11574?: An issue was discovered in Simple Machines Forum (SMF) before release 2.0.17. There is SSRF related to Subs-Package.php and Subs.php because user-supplied data is used directly in curl calls.
How severe is CVE-2019-11574?: CVE-2019-11574 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-2019-11574 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-11574?: CVE-2019-11574 affects Simplemachines Simple Machine Forum. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-11574?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2019-11574 published?: CVE-2019-11574 was published on 2020-03-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:simplemachines:simple_machine_forum:*:*:*:*:*:*:*:*

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