Auth bypass in Telegram Desktop
CVE-2020-25824
Telegram Desktop through 2.4.3 does not require passcode entry upon pushing the Export key within the Export Telegram Data wizard. The threat model is a victim who has voluntarily opened Export Wizard but is then distracted. An attacker then approaches the unattended desktop and pushes the Export key. This attacker may consequently gain access to all chat conversation and media files.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 2.4 (Low). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (43.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 43.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
Weakness classification (CWE)
References
- www.Telegram.org (Product)
- github.com/soheilsamanabadi/vulnerability/blob/main/Telegram-Desktop-CVE-2020-2… (Third Party Advisory)
- github.com/telegramdesktop/tdesktop/releases/tag/v2.4.3 (Third Party Advisory, Release Notes)
- security.gentoo.org/glsa/202101-34 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-25824?
- CVE-2020-25824 is a low-severity vulnerability in Telegram Desktop, classified under Missing Authentication for Critical Function. CVSS score: 2.4/10. Published 2020-10-14.
- How severe is CVE-2020-25824?
- Low severity. CVSS v3 base score is 2.4 out of 10.