How severe is CVE-2018-18783?

CVE-2018-18783 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2018-18783 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-18783?

CVE-2018-18783 affects Sem-cms Semcms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-18783?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-18783 published?

CVE-2018-18783 was published on 2018-10-29 and last updated on 2026-06-17.

CVE-2018-18783

CVE-2018-18783 is a medium-severity vulnerability in Sem-cms Semcms with a CVSS 3.x base score of 6.1. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Sem-cms Semcms
Published: 2018-10-29
Last modified: 2026-06-17

Description

XSS was discovered in SEMCMS V3.4 via the semcms_remail.php?type=ok umail parameter.

Frequently asked questions

What is CVE-2018-18783?: XSS was discovered in SEMCMS V3.4 via the semcms_remail.php?type=ok umail parameter.
How severe is CVE-2018-18783?: CVE-2018-18783 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2018-18783 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-18783?: CVE-2018-18783 affects Sem-cms Semcms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-18783?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-18783 published?: CVE-2018-18783 was published on 2018-10-29 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:sem-cms:semcms:3.4:*:*:*:*:*:*:*

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