How severe is CVE-2018-18831?

CVE-2018-18831 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2018-18831 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-18831?

CVE-2018-18831 affects Mingsoft Mcms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-18831?

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

When was CVE-2018-18831 published?

CVE-2018-18831 was published on 2018-10-30 and last updated on 2026-06-17.

CVE-2018-18831

CVE-2018-18831 is a high-severity vulnerability in Mingsoft Mcms with a CVSS 3.x base score of 7.5. 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: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Mingsoft Mcms
Published: 2018-10-30
Last modified: 2026-06-17

Description

An issue was discovered in com\mingsoft\cms\action\GeneraterAction.java in MCMS 4.6.5. An attacker can write a .jsp file (in the position parameter) to an arbitrary directory via a ../ Directory Traversal in the url parameter.

Frequently asked questions

What is CVE-2018-18831?: An issue was discovered in com\mingsoft\cms\action\GeneraterAction.java in MCMS 4.6.5. An attacker can write a .jsp file (in the position parameter) to an arbitrary directory via a ../ Directory Traversal in the url parameter.
How severe is CVE-2018-18831?: CVE-2018-18831 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2018-18831 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-18831?: CVE-2018-18831 affects Mingsoft Mcms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-18831?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-18831 published?: CVE-2018-18831 was published on 2018-10-30 and last updated on 2026-06-17.

References

https://gitee.com/mingSoft/MCMS/issues/IO0K0

Affected products (1)

cpe:2.3:a:mingsoft:mcms:4.6.5:*:*:*:*:*:*:*

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