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Fencer Intel
medium 6.1

CVE-2020-18084 json

Cross Site Scripting (XSS) in yzmCMS v5.2 allows remote attackers to execute arbitrary code by injecting commands into the "referer" field…

published 5y ago modified 4mo ago also EUVD-2020-10013

cvss
6.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.3%
EPSS 1.3% chance of exploitation in 30 days, percentile 70%
public exploits
0
none known

Summary

Cross Site Scripting (XSS) in yzmCMS v5.2 allows remote attackers to execute arbitrary code by injecting commands into the "referer" field of a POST request to the component "/member/index/login.html" when logging in.

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Exploit prediction

1.32% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/yzmcms/yzmcms/issues/9 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

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

References

Sources

Fencer Intel 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.