XSS in Openwrt Luci
CVE-2026-68583
luci-app-adblock-fast before 1.2.4-4 contains a stored cross-site scripting vulnerability in the blocklist name field that allows lower-privileged users to inject active HTML. When an administrator views the AdBlock Fast status page, the injected payload executes in the administrator's browser under the LuCI origin.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
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: 0.002 (14.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 14.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Openwrt Luci — versions 0, 1.2.4-4
Weakness classification (CWE)
References
- github.com/openwrt/luci/security/advisories/GHSA-q335-4c83-c88h (vendor-advisory)
- www.vulncheck.com/advisories/luci-app-adblock-fast-before-4-stored-xss-via-file… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-68583?
- CVE-2026-68583 is a medium-severity vulnerability in Openwrt Luci, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-08-02.
- How severe is CVE-2026-68583?
- Medium severity. CVSS v3 base score is 5.4 out of 10.