How severe is CVE-2019-17399?

CVE-2019-17399 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-2019-17399 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-17399?

CVE-2019-17399 affects Joomlashack Shack Forms Pro. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-17399?

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-2019-17399 published?

CVE-2019-17399 was published on 2019-10-09 and last updated on 2026-06-17.

CVE-2019-17399

CVE-2019-17399 is a critical-severity vulnerability in Joomlashack Shack Forms Pro 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-22.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (74th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Joomlashack Shack Forms Pro
Published: 2019-10-09
Last modified: 2026-06-17

Description

The Shack Forms Pro extension before 4.0.32 for Joomla! allows path traversal via a file attachment.

Frequently asked questions

What is CVE-2019-17399?: The Shack Forms Pro extension before 4.0.32 for Joomla! allows path traversal via a file attachment.
How severe is CVE-2019-17399?: CVE-2019-17399 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-2019-17399 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-17399?: CVE-2019-17399 affects Joomlashack Shack Forms Pro. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-17399?: 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-2019-17399 published?: CVE-2019-17399 was published on 2019-10-09 and last updated on 2026-06-17.

References

https://www.joomlashack.com/changelog/shack-forms/

Affected products (1)

cpe:2.3:a:joomlashack:shack_forms_pro:*:*:*:*:*:joomla\!:*:*

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