EUVD-2026-68614
GHSA-m8rm-322m-r9gv
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/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
Network-delivered XSS via crafted file; user must open file (UI:R); Electron context warrants scope change with low C and I impact.
Primary rating from Vendor (VulDB).
CVSS VectorVendor: VulDB
Lifecycle Timeline
4DescriptionCVE.org
A vulnerability was found in Typora up to 1.13.8/1.14.6. This vulnerability affects unknown code of the component Mermaid Rendering Engine. The manipulation of the argument classDef/style results in cross site scripting. The attack may be launched remotely. The exploit has been made public and could be used. Upgrading to version 1.14.8 is able to resolve this issue. You should upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.
AnalysisAI
Cross-site scripting in Typora's embedded Mermaid rendering engine allows remote attackers to inject and execute arbitrary JavaScript by manipulating the classDef or style arguments within Mermaid diagram syntax. Affected versions include all Typora releases up to 1.13.8 and 1.14.6; a publicly available proof-of-concept exploit exists on GitHub. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the victim is running Typora version 1.13.8 or earlier (stable) or 1.14.6 or earlier (beta/pre-release) and opens or previews a file containing a Mermaid diagram block with attacker-controlled `classDef` or `style` argument content. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 5.3 (Medium) reflects the realistic constrained impact: network-accessible (AV:N), low complexity (AC:L), no privileges required (PR:N), but passive user interaction required (UI:P) and limited integrity-only vulnerable-system impact (VI:L, VC:N). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade Typora to version 1.14.8 or later, which is confirmed by the vendor as resolving this issue; the patched release is available at https://typora.io/releases/all and https://typora.io/#download. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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