What’s Vulnerable › Vulnerabilities

CVE-2018-15670

• Severity: medium (CVSS 4.3 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-08-21 · updated 2026-06-17
• Weakness: CWE-20

Description

An issue was discovered in Bloop Airmail 3 3.5.9 for macOS. Its primary WebView instance implements "webView:decidePolicyForNavigationAction:request:frame:decisionListener:" such that OpenURL is the default URL handler. A navigation request is processed by the default URL handler only if the currentEvent is NX_LMOUSEUP or NX_OMOUSEUP. An attacker may abuse HTML elements with an EventHandler for a chance to validate navigation requests for URLs that are processed during the NX_LMOUSEUP event triggered by clicking an email.

Affected products

• Bloop Airmail: 3.3.5.9

References

• https://versprite.com/advisories/airmail-3-for-mac-4/
• https://versprite.com/advisories/airmail-3-for-mac-4/

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