HOMEVULNERABILITIESCVE-2021-25981
CRITICAL

CVE-2021-25981

CWE-613Published: January 3, 2022· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official 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)

NVD Source

Technical Analysis

CVE-2021-25981 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

talkyard1 product(s)
talkyard
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

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

All References (6)

→
https://github.com/debiki/talkyard/commit/b0310df019887f3464895529c773bc7d85ddcf34Patch · Third Party Advisory
→
https://github.com/debiki/talkyard/commit/b0712915d8a22a20b09a129924e8a29c25ae5761Patch · Third Party Advisory
→
https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25981Patch · Third Party Advisory · VDB Entry
→
https://github.com/debiki/talkyard/commit/b0310df019887f3464895529c773bc7d85ddcf34Patch · Third Party Advisory
→
https://github.com/debiki/talkyard/commit/b0712915d8a22a20b09a129924e8a29c25ae5761Patch · Third Party Advisory
→
https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25981Patch · Third Party Advisory · VDB Entry

Quick Facts

CVE IDCVE-2021-25981
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-613
CISA KEVNo
Affected1 vendor(s)
PublishedJan 3, 2022

Related CVEs (CWE-613)

CVE-2021-25992
9.8
CVE-2026-26290
9.8
CVE-2025-4528
9.8
CVE-2025-40566
9.8
CVE-2026-26342
9.8
CVE-2025-59786
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-25981 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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