How severe is CVE-2019-18952?

CVE-2019-18952 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-2019-18952 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 45% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-18952?

CVE-2019-18952 affects Sibsoft Xfilesharing. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-18952?

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-2019-18952 published?

CVE-2019-18952 was published on 2019-11-13 and last updated on 2026-06-17.

CVE-2019-18952

CVE-2019-18952 is a critical-severity vulnerability in Sibsoft Xfilesharing with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 45% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 45% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Sibsoft Xfilesharing
Published: 2019-11-13
Last modified: 2026-06-17

Description

SibSoft Xfilesharing through 2.5.1 allows cgi-bin/up.cgi arbitrary file upload. This can be combined with CVE-2019-18951 to achieve remote code execution via a .html file, containing short codes, that is served over HTTP.

Frequently asked questions

What is CVE-2019-18952?: SibSoft Xfilesharing through 2.5.1 allows cgi-bin/up.cgi arbitrary file upload. This can be combined with CVE-2019-18951 to achieve remote code execution via a .html file, containing short codes, that is served over HTTP.
How severe is CVE-2019-18952?: CVE-2019-18952 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-2019-18952 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 45% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-18952?: CVE-2019-18952 affects Sibsoft Xfilesharing. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-18952?: 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-2019-18952 published?: CVE-2019-18952 was published on 2019-11-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:sibsoft:xfilesharing:*:*:*:*:*:*:*:*

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CVE-2019-18951 — High (CVSS 7.5): SibSoft Xfilesharing through 2.5.1 allows op=page&tmpl=../ directory traversal to read arbitrary files.

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