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Fencer Intel
medium 6.1

CVE-2018-20503 json

Allied Telesis 8100L/8 devices allow XSS via the edit-ipv4_interface.php vlanid or subnet_mask parameter.

published 7y ago modified 4mo ago also EUVD-2018-13057

cvss
6.1
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.9%
EPSS 3.9% chance of exploitation in 30 days, percentile 90%
public exploits
1
Exploit-DB

Summary

Allied Telesis 8100L/8 devices allow XSS via the edit-ipv4_interface.php vlanid or subnet_mask parameter.

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Timeline

  1. First public exploit (EDB-46237)
  2. Published

Exploit prediction

3.90% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-46237 SirsiDynix e-Library 3.5.x - Cross-Site Scripting webapps, 2019-01-24
  • packetstormsecurity.com http://packetstormsecurity.com/files/151327/SirsiDynix-e-Library-3.5.x-Cross-Site-Scripting.html referenced PoC, tagged "exploit" by a source, unverified
  • pentest.com.tr https://pentest.com.tr/exploits/Allied-Telesis-8100L-8-Cross-Site-Scripting.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 6.1 CVSS:3.0/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.