What is CVE-2019-18993?

CVE-2019-18993 is a medium-severity vulnerability in Openwrt, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2019-12-03.

How severe is CVE-2019-18993?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Is CVE-2019-18993 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Openwrt

CVE-2019-18993

OpenWrt 18.06.4 allows XSS via the "New port forward" Name field to the cgi-bin/luci/admin/network/firewall/forwards URI (this can occur, for example, on a TP-Link Archer C7 device).

Vulnerability class: XSS (Cross-Site Scripting)

Published 2019-12-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.005 (43.6th percentile), scored 2026-10-26.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 43.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Openwrt — versions 18.06.4

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

BloodyOrangeMan/DVRF

References

github.com/openwrt/luci/commit/c048f23bad54b0a79449652380b317819e0ea978 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2019-18993?: CVE-2019-18993 is a medium-severity vulnerability in Openwrt, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2019-12-03.
How severe is CVE-2019-18993?: Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2019-18993 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.