CVE-2018-18840

Name: CVE-2018-18840
Creator: NVD / NIST
Published: 2018-10-30T06:29:01.437+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.56%

Last modified Jun 17, 2026

CVE-2018-18840 is a vulnerability of currently unknown severity. XSS was discovered in SEMCMS PHP V3.4 via the SEMCMS_SeoAndTag.php?Class=edit&CF=SeoAndTag tag_indexmetatit parameter.. EPSS estimates a 0.56% chance of exploitation in the next 30 days.

Description

XSS was discovered in SEMCMS PHP V3.4 via the SEMCMS_SeoAndTag.php?Class=edit&CF=SeoAndTag tag_indexmetatit parameter.

Metrics

EPSS Probability

0.56%

42.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Sem-Cms	Semcms	3.4

References

https://github.com/m3lon/XSS-Expoit/blob/master/SEMCMS%20Stored%20XSS%20Vulnerability.mdExploit, Third Party Advisory
https://github.com/m3lon/XSS-Expoit/blob/master/SEMCMS%20Stored%20XSS%20Vulnerability.mdExploit, Third Party Advisory

Timeline

Published: Oct 30, 2018
Last Modified: Jun 17, 2026
Status: Modified

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?

Severity scoring for CVE-2018-18840 is pending analysis. The EPSS model estimates a 0.56% probability of exploitation in the next 30 days.

How do I fix CVE-2018-18840?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-18840?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST