CVE-2018-18840
CVE-2018-18840 is a medium-severity vulnerability in Sem-cms Semcms with a CVSS 3.x base score of 5.4. 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 5.4)
- CVSS v2: 3.5
- EPSS exploit prediction: 1% (42nd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-79
- Affected product: Sem-cms Semcms
- Published:
- Last modified:
Description
XSS was discovered in SEMCMS PHP V3.4 via the SEMCMS_SeoAndTag.php?Class=edit&CF=SeoAndTag tag_indexmetatit parameter.
Frequently asked questions
- What is CVE-2018-18840?
- XSS was discovered in SEMCMS PHP V3.4 via the SEMCMS_SeoAndTag.php?Class=edit&CF=SeoAndTag tag_indexmetatit parameter.
- How severe is CVE-2018-18840?
- CVE-2018-18840 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
- Is CVE-2018-18840 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2018-18840?
- CVE-2018-18840 affects Sem-cms Semcms. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2018-18840?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2018-18840 published?
- CVE-2018-18840 was published on 2018-10-30 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:sem-cms:semcms:3.4:*:*:*:*:*:*:*
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