How severe is CVE-2018-1000043?

CVE-2018-1000043 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-2018-1000043 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-1000043?

CVE-2018-1000043 affects Securityonion Squert. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-1000043?

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-2018-1000043 published?

CVE-2018-1000043 was published on 2018-02-09 and last updated on 2026-06-17.

CVE-2018-1000043

CVE-2018-1000043 is a critical-severity vulnerability in Securityonion Squert 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-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Securityonion Squert
Published: 2018-02-09
Last modified: 2026-06-17

Description

Security Onion Solutions Squert version 1.0.1 through 1.6.7 contains a CWE-78: Improper Neutralization of Special Elements used in an OS Command (OS Command Injection) vulnerability in .inc/callback.php that can result in execution of OS Commands. This attack appear to be exploitable via Web request to .inc/callback.php with the payload in the txdata parameter, used in tx()/transcript(), or the catdata parameter, used in cat(). This vulnerability appears to have been fixed in 1.7.0.

Frequently asked questions

What is CVE-2018-1000043?: Security Onion Solutions Squert version 1.0.1 through 1.6.7 contains a CWE-78: Improper Neutralization of Special Elements used in an OS Command (OS Command Injection) vulnerability in .inc/callback.php that can result in execution of OS Commands. This attack appear to be exploitable via Web request to .inc/callback.php with the payload in the txdata parameter, used in tx()/transcript(), or the catdata parameter, used in cat(). This vulnerability appears to have been fixed in 1.7.0.
How severe is CVE-2018-1000043?: CVE-2018-1000043 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-2018-1000043 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-1000043?: CVE-2018-1000043 affects Securityonion Squert. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-1000043?: 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-2018-1000043 published?: CVE-2018-1000043 was published on 2018-02-09 and last updated on 2026-06-17.

References

http://blog.securityonion.net/2018/01/security-advisory-for-squert.html

Affected products (1)

cpe:2.3:a:securityonion:squert:*:*:*:*:*:*:*:*

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CVE-2018-1000044 — Critical (CVSS 9.8): Security Onion Solutions Squert version 1.1.1 through 1.6.7 contains a SQL Injection vulnerability in .inc/callback.php…
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