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CVE-2021-25980

27
FAUCET Score

CVE-2021-25980 is a Host Header Injection vulnerability affecting Talkyard versions v0.04.01 through v0.6.74-WIP-63220cb, v0.2020.22-WIP-b2e97fe0e through v0.2021.02-WIP-879ef3fe1, and specific tyse-v0.2021.02-879ef3fe1-regular through tyse-v0.2021.28-af66b6905-regular releases. This high-severity vulnerability (CVSS 8.8) allows an unauthenticated attacker to take over a victim's account by tricking them into clicking a malicious link, leveraging the "forgot password" functionality. While the attack requires user interaction, its low complexity and high impact on confidentiality, integrity, and availability are significant. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 0.04.01, <= 0.6.74-wip-63220cbCPE matchmatch criteria
cpe:2.3:a:talkyard:talkyard:*:*:*:*:*:*:*:*
>= 0.2020.22-wip-b2e97fe0e, <= 0.2021.02-wip-879ef3fe1CPE matchmatch criteria
cpe:2.3:a:talkyard:talkyard:*:*:*:*:*:*:*:*
>= tyse-v0.2021.02-879ef3fe1-regular, <= tyse-v0.2021.28-af66b6905-regularCPE matchmatch criteria
cpe:2.3:a:talkyard:talkyard:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.21%
Probability of exploitation in next 30 days
EPSS Percentile
65.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0121 is in the 64th percentile among its peer group of 14,848 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / debiki/talkyard/commit/4067e191a909ed06f250d09a40e43aa5edbb0289
PatchThird Party Advisory
whitesourcesoftware.com / vulnerability-database/CVE-2021-25980
Third Party Advisory