What’s Vulnerable › Vulnerabilities

CVE-2021-25981: Talkyard - Insufficient Session Expiration

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-01-03 · updated 2026-06-17
• Weakness: CWE-613

Description

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

• debiki talkyard: from 0.2021.20 before 0.2021.35 — fixed in 0.2021.35

How to fix

Upgrade to a fixed version: debiki talkyard 0.2021.35. Check the vendor advisory for mitigations.

References

• https://github.com/debiki/talkyard/commit/b0310df019887f3464895529c773bc7d85ddcf34
• https://github.com/debiki/talkyard/commit/b0712915d8a22a20b09a129924e8a29c25ae5761
• https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25981
• https://github.com/debiki/talkyard/commit/b0310df019887f3464895529c773bc7d85ddcf34
• https://github.com/debiki/talkyard/commit/b0712915d8a22a20b09a129924e8a29c25ae5761
• https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25981

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