Maxthon3 about:history XCS Trusted Zone Code Execution
Published Aug 5, 2025
8.7
HIGHCVSS 4.0
EPSS 1.28%
Description
Maxthon3 version 3.2.2 build 1000 and prior are vulnerable to cross context scripting (XCS) via the about:history page. The browser’s trusted zone improperly handles injected script content, allowing attackers to execute arbitrary JavaScript in a privileged context. This flaw enables modification of browser configuration and execution of arbitrary code through Maxthon’s exposed DOM APIs, including maxthon.program.Program.launch() and maxthon.io.writeDataURL(). Exploitation requires user interaction, typically by visiting a malicious webpage that triggers the injection.
Affected products
-
- Version 3.1.7 build 600StatusaffectedConstraints<=3.2.2 build 1000
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Maxthon International Ltd. | Maxthon3 Browser | unaffected |
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
1 other source (NVD) ▾
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
NoTechnical Impact
TotalDecision
n/aAssessed Aug 7, 2025 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2025–2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.28% (0.01276) | 68.88th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.85% (0.00846) | 53.08th | v5 (v2026.06.15) |
| Jun 13, 2026 | 70.61% (0.70606) | 98.72th | v4 (v2025.03.14) |
| Jun 3, 2026 | 67.79% (0.67787) | 98.60th | v4 (v2025.03.14) |
| Jun 1, 2026 | 71.43% (0.71433) | 98.74th | v4 (v2025.03.14) |
| May 29, 2026 | 53.57% (0.53575) | 98.03th | v4 (v2025.03.14) |
| May 26, 2026 | 42.97% (0.42968) | 97.54th | v4 (v2025.03.14) |
| Apr 21, 2026 | 48.63% (0.48631) | 97.76th | v4 (v2025.03.14) |
| Jan 1, 2026 | 45.26% (0.45260) | 97.49th | v4 (v2025.03.14) |
| Dec 5, 2025 | 56.52% (0.56521) | 98.00th | v4 (v2025.03.14) |
| Oct 8, 2025 | 50.29% (0.50293) | 97.67th | v4 (v2025.03.14) |
| Aug 6, 2025 | 0.08% (0.00084) | 25.27th | v4 (v2025.03.14) |
References (6)
- http://blog.malerisch.net/2012/12/maxthon-cross-context-scripting-xcs-about-history-rce.html technical-descriptionexploit
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/browser/maxthon_history_xcs.rb exploit
- https://www.exploit-db.com/exploits/23225 exploit
- https://www.fortiguard.com/encyclopedia/ips/34203 third-party-advisory
- https://www.maxthon.com/ product
- https://www.vulncheck.com/advisories/maxthon3-xcs-trusted-zone-code-exec third-party-advisory
| Link | Providers | Tags |
|---|---|---|
| http://blog.malerisch.net/2012/12/maxthon-cross-context-scripting-xcs-about-history-rce.html | technical-descriptionexploit | |
| https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/browser/maxthon_history_xcs.rb | exploit | |
| https://www.exploit-db.com/exploits/23225 | exploit | |
| https://www.fortiguard.com/encyclopedia/ips/34203 | third-party-advisory | |
| https://www.maxthon.com/ | product | |
| https://www.vulncheck.com/advisories/maxthon3-xcs-trusted-zone-code-exec | third-party-advisory |
Change history (0)
No recorded changes yet.