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CVE-2018-20503

31
FAUCET Score

CVE-2018-20503 describes a Cross-Site Scripting (XSS) vulnerability in Allied Telesis 8100L/8 devices, specifically through the edit-ipv4_interface.php script's vlanid or subnet_mask parameters. Rated 6.1 MEDIUM, this vulnerability can be exploited remotely with low attack complexity, requiring user interaction, and could lead to limited confidentiality and integrity impacts. There is no evidence of active exploitation, nor is it listed in the KEV catalog; however, an ExploitDB entry for a different product (SirsiDynix e-Library) is mistakenly associated with this CVE. Community discussion and media coverage are minimal, indicating low public awareness.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:alliedtelesis:8100l\/8_firmware:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.1MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.90%
Probability of exploitation in next 30 days
EPSS Percentile
89.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
ExploitDB: EDB-46237 · Jan 24, 2019
This CVE's current EPSS score of 0.0390 is in the 95th percentile among its peer group of 26,219 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

packetstormsecurity.com / files/151327/SirsiDynix-e-Library-3.5.x-Cross-Site-Scripting.html
ExploitThird Party AdvisoryVDB Entry
pentest.com.tr / exploits/Allied-Telesis-8100L-8-Cross-Site-Scripting.html
ExploitThird Party Advisory
exploit-db.com / exploits/46237
ExploitThird Party AdvisoryVDB Entry