CVE-2021-25981: Talkyard

Critical severity, CVSS 9.8. EPSS: 2.5% chance of exploitation in the next 30 days.

In Talkyard, regular versions v0.2021.20 through v0.2021.33 and dev versions v0.2021.20 through v0.2021.34, are vulnerable to Insufficient Session Expiration. This may allow an attacker to reuse the admin’s still-valid session token even when logged-out, to gain admin privileges, given the attacker is able to obtain that token (via other, hypothetical attacks)

Affected products

• Talkyard Talkyard: from 0.2021.20, before 0.2021.35 (fixed in 0.2021.35)

Published 2022-01-03. Last modified 2026-06-17.