CVE-2018-20436

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…

published December 24, 2018

CVSS
—
EPSS
2%
Percentile
74.9
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.01554 · 74.9th percentile
Published
2018-12-24T20:00Z
EPSS history
Timeline
  • 24 DEC 20:00Z
    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…
    cvelistv5