What’s Vulnerable › Vulnerabilities

CVE-2024-33905

• Severity: medium (CVSS 4.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-04-29 · updated 2026-06-17
• Weakness: CWE-79

Description

In Telegram WebK before 2.0.0 (488), a crafted Mini Web App allows XSS via the postMessage web_app_open_link event type.

Affected products

• Morethanwords Tweb: before vite_build_488 — fixed in vite_build_488

How to fix

Upgrade to a fixed version: Morethanwords Tweb vite_build_488. Check the vendor advisory for mitigations.

References

• http://www.openwall.com/lists/oss-security/2024/04/30/4
• https://github.com/morethanwords/tweb/commit/2153ea9878668769faac8dd5931b7e0b96a9f129/src/components/popups/webApp.ts
• https://medium.com/%40pedbap/telegram-web-app-xss-session-hijacking-1-click-95acccdc8d90
• https://www.openwall.com/lists/oss-security/2024/04/28/4
• http://www.openwall.com/lists/oss-security/2024/04/30/4
• https://github.com/morethanwords/tweb/commit/2153ea9878668769faac8dd5931b7e0b96a9f129/src/components/popups/webApp.ts
• https://medium.com/%40pedbap/telegram-web-app-xss-session-hijacking-1-click-95acccdc8d90
• https://www.openwall.com/lists/oss-security/2024/04/28/4

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