CVE-2021-25980

Talkyard - Host-Header Injection Leads to Account Takeover

Published Nov 11, 2021 CVSS 3.1 · 8.8 High EPSS 1.3% KEV · Not listed
Description
In Talkyard, versions v0.04.01 through v0.6.74-WIP-63220cb, v0.2020.22-WIP-b2e97fe0e through v0.2021.02-WIP-879ef3fe1 and tyse-v0.2021.02-879ef3fe1-regular through tyse-v0.2021.28-af66b6905-regular, are vulnerable to Host Header Injection. By luring a victim application-user to click on a link, an unauthenticated attacker can use the “forgot password” functionality to reset the victim’s password and successfully take over their account.

Remediation

Vendor Solution

Update to tyse-v0.2021.29-8cb7f73fe-regular or later

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2021-12807 In Talkyard, versions v0.04.01 through v0.6.74-WIP-63220cb, v0.2020.22-WIP-b2e97fe0e through v0.2021.02-WIP-879ef3fe1 and tyse-v0.2021.02-879ef3fe1-regular through tyse-v0.2021.28-af66b6905-regular, are vulnerable to Host Header Injection. By luring a victim application-user to click on a link, an unauthenticated attacker can use the “forgot password” functionality to reset the victim’s password and successfully take over their account.
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Mend
Published
Updated
Apr 30, 2025, 3:46 PM
Reserved
Jan 22, 2021, 12:00 AM
Status
Modified
Published
Nov 11, 2021, 7:15 AM
Modified
Jun 17, 2026, 3:42 AM