In Midori Browser 0.5.11 (on Windows 10), Content Security Policy (CSP) is not applied correctly to all parts of multipart content sent with the multipart/x-mixed-replace MIME type
Published Dec 20, 2019
6.1
MEDIUMCVSS 3.1
EPSS 1.57%
Description
In Midori Browser 0.5.11 (on Windows 10), Content Security Policy (CSP) is not applied correctly to all parts of multipart content sent with the multipart/x-mixed-replace MIME type. This could result in script running where CSP should have blocked it, allowing for cross-site scripting (XSS) and other attacks when the product renders the content as HTML. Remediating this would also need to consider the polyglot case, e.g., a file that is a valid GIF image and also valid JavaScript.
Affected products
No data.
- 0.5.11
Running on/with
- n/a
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:N/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 1.57% (0.01570) | 74.51th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.57% (0.01570) | 72.07th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.06% (0.00061) | 16.16th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.17% (0.00166) | 54.69th | v3 (v2023.03.01) |
| Sep 6, 2023 | 0.17% (0.00166) | 52.78th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.08% (0.00085) | 34.47th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00954) | 36.37th | v2 (v2022.01.01) |
| Sep 2, 2022 | 0.95% (0.00954) | 34.50th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.95% (0.00954) | 32.50th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.28% (0.03283) | 65.67th | v2 (v2022.01.01) |
| Feb 3, 2022 | 31.39% (0.31393) | 96.83th | v1 |
| Jan 6, 2022 | 31.39% (0.31393) | 96.79th | v1 |
| Sep 1, 2021 | 9.25% (0.09255) | 93.94th | v1 |
| Apr 14, 2021 | 9.25% (0.09255) | 0.00th | v1 |
References (3)
- https://blog.mozilla.org/security/2016/08/26/mitigating-mime-confusion-attacks-in-firefox/ x_refsource_MISCThird Party Advisory
- https://github.com/V1n1v131r4/MIME-Confusion-Attack-on-Midori-Browser/blob/master/README.md x_refsource_MISCExploitThird Party Advisory
- https://portswigger.net/research/bypassing-csp-using-polyglot-jpegs x_refsource_MISCExploitThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://blog.mozilla.org/security/2016/08/26/mitigating-mime-confusion-attacks-in-firefox/ | x_refsource_MISCThird Party Advisory | |
| https://github.com/V1n1v131r4/MIME-Confusion-Attack-on-Midori-Browser/blob/master/README.md | x_refsource_MISCExploitThird Party Advisory | |
| https://portswigger.net/research/bypassing-csp-using-polyglot-jpegs | x_refsource_MISCExploitThird Party Advisory |
Change history (0)
No recorded changes yet.