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Fencer Intel
medium 5.4

CVE-2021-3159 json

A stored cross site scripting (XSS) vulnerability in the /sys/attachment/uploaderServlet component of Landray EKP V12.0.9.R.20160325 allows…

published 5y ago modified 4mo ago also EUVD-2021-26503

cvss
5.4
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 44%
public exploits
0
none known

Summary

A stored cross site scripting (XSS) vulnerability in the /sys/attachment/uploaderServlet component of Landray EKP V12.0.9.R.20160325 allows attackers to execute arbitrary web scripts or HTML via a crafted SVG, SHTML, or MHT file.

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Exploit prediction

0.52% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/fa1c0n1/m01e-wiki/blob/main/my-vulns/landray-ekp.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/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 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.