How severe is CVE-2020-18078?

CVE-2020-18078 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-2020-18078 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-18078?

CVE-2020-18078 affects Sem-cms Semcms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-18078?

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-2020-18078 published?

CVE-2020-18078 was published on 2021-12-17 and last updated on 2026-06-17.

CVE-2020-18078

CVE-2020-18078 is a critical-severity vulnerability in Sem-cms Semcms 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.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 5.0
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Sem-cms Semcms
Published: 2021-12-17
Last modified: 2026-06-17

Description

A vulnerability in /include/web_check.php of SEMCMS v3.8 allows attackers to reset the Administrator account's password.

Frequently asked questions

What is CVE-2020-18078?: A vulnerability in /include/web_check.php of SEMCMS v3.8 allows attackers to reset the Administrator account's password.
How severe is CVE-2020-18078?: CVE-2020-18078 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-2020-18078 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-18078?: CVE-2020-18078 affects Sem-cms Semcms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-18078?: 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-2020-18078 published?: CVE-2020-18078 was published on 2021-12-17 and last updated on 2026-06-17.

References

https://github.com/cve-vul/vul/blob/master/SEMCMS/back_password_reset.md

Affected products (1)

cpe:2.3:a:sem-cms:semcms:3.8:*:*:*:*:*:*:*

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