In uBlock before 0.9.5.15, the $rewrite filter option allows filter-list maintainers to…
Priority MEDIUM 43CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA.
Summary
In uBlock before 0.9.5.15, the $rewrite filter option allows filter-list maintainers to run arbitrary code in a client-side session when a web service loads a script for execution using XMLHttpRequest or Fetch, and the script origin has an open redirect.
Why it matters now
EPSS 0.02407 84th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:ublockorigin:ublock_origin:*:*:*:*:*:*:*:* | before 0.9.5.15 | Vulnerable | Ublockorigin |
- cpe:2.3:a:ublockorigin:ublock_origin:*:*:*:*:*:*:*:* Versions before 0.9.5.15 Vulnerable ·Ublockorigin
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2019-11595
- 2026-10-03 Alias added: GHSA-cq4j-49w3-ppw7
References
More Ublockorigin Ublock Origin vulnerabilities
- TI-2025-03748 gorhill uBlock Origin UI 1p-filters.js currentStateChanged redos CVSS 4.0LOW 2.3
- TI-2021-14894 uBlock Origin before 1.36.2 and nMatrix before 4.4.9 support an arbitrary depth of… CVSS 3.1HIGH 7.5
Sources
- CVE-2019-11595 · CVE Program
- CVE-2019-11595 · NVD
- FIRST EPSS
- GHSA-cq4j-49w3-ppw7 · GitHub Advisory Database · CC BY 4.0
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