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CVE-2018-20436

N/A
Published: December 24, 2018 at 08:00 PM UTC
Updated: June 17, 2026 at 01:52 AM UTC
2 products affected across 1 vendorTelegramWeb

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Severity
N/A
Exploit prediction
EPSS 2%

Description

The "secret chat" feature in Telegram 4.9.1 for Android has a "side channel" in which Telegram servers send GET requests for URLs typed while composing a chat message, before that chat message is sent. There are also GET requests to other URLs on the same web server. This also affects one or more other Telegram products, such as Telegram Web-version 0.7.0. In addition, it can be interpreted as an SSRF issue. NOTE: a third party has reported that potentially unwanted behavior is caused by misconfiguration of the "Secret chats > Preview links" setting

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://misteralfa-hack.blogspot.com/2018/12/abusando-de-telegram-para-conseguir-una.html
x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://misteralfa-hack.blogspot.com/2018/12/telegram-siempre-in-middle.html

CVSS

6.8MEDIUM[email protected]
Confidentiality
PARTIAL
Integrity
PARTIAL
Availability
PARTIAL
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-918

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