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Fencer Vulns
medium 4.8

CVE-2018-20137 json

XSS exists in FUEL CMS 1.4.3 via the Page title, Meta description, or Meta keywords during page data management, as demonstrated by the pag…

published 2018-12-13 7 y ago modified 2026-06-17 4 mo ago also EUVD-2018-12706

cvss
4.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 46%
public exploits
0
none known

Summary

XSS exists in FUEL CMS 1.4.3 via the Page title, Meta description, or Meta keywords during page data management, as demonstrated by the pages/edit/1?lang=english URI.

Exploit prediction

0.56% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/CCCCCrash/POCs/tree/master/Web/fuel-cms/xss1 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 4.8 CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:N/I:P/A:N

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.