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Critical

Security advisory

Type: advisorySources: OSVCVE: CVE-2021-25981

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)

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2021-25981
Confirmed fixed CVEs
Not specified
Updated in this feed
31 Oct 2026, 11:15 UTC · Revision 1

Source evidence

CVE-2021-25981

core-osv · Original source

Published 3 Jan 2022, 07:15 UTC

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)

osv:CVE-2021-25981
Complete source record
{
  "id": "7250937e8ba96a763de53458a558249c8873f961dc92135d69713b2523f4e499",
  "url": "https://osv.dev/vulnerability/CVE-2021-25981",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-25981",
    "summary": "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)",
    "evidence": "osv:CVE-2021-25981",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2021-25981",
      "aliases": [
        "CVE-2021-25981"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/debiki/talkyard",
              "type": "GIT",
              "events": [
                {
                  "introduced": "33a06102ff72e90092c62500935152f741079bc1"
                },
                {
                  "fixed": "33bd1b95687644a4665deeb18bf24db478c17c87"
                },
                {
                  "fixed": "b0310df019887f3464895529c773bc7d85ddcf34"
                },
                {
                  "fixed": "b0712915d8a22a20b09a129924e8a29c25ae5761"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:talkyard:talkyard:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0.2021.20"
                      },
                      {
                        "fixed": "0.2021.35"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "b0310df019887f3464895529c773bc7d85ddcf34"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "b0712915d8a22a20b09a129924e8a29c25ae5761"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "tyse-v0.2021.34-WIP-36576003a-dev",
            "tyse-v0.2021.33-WIP-2d094dfcc-dev",
            "tyse-v0.2021.33-2d094dfcc-regular",
            "tyse-v0.2021.32-WIP-941eff7aa-dev",
            "tyse-v0.2021.32-941eff7aa-regular",
            "tyse-v0.2021.31-f93d78122-regular",
            "tyse-v0.2021.31-WIP-f93d78122-dev",
            "tyse-v0.2021.30-WIP-463dc6017-dev",
            "tyse-v0.2021.30-463dc6017-regular",
            "tyse-v0.2021.29-WIP-8cb7f73fe-dev",
            "tyse-v0.2021.29-8cb7f73fe-regular",
            "tyse-v0.2021.28-af66b6905-regular",
            "tyse-v0.2021.28-WIP-af66b6905-dev",
            "tyse-v0.2021.27-WIP-3e9e549c2-dev",
            "tyse-v0.2021.27-3e9e549c2-regular",
            "tyse-v0.2021.26-WIP-fc86e0436-dev",
            "tyse-v0.2021.25-b73f32922-regular",
            "tyse-v0.2021.25-WIP-b73f32922-dev",
            "tyse-v0.2021.24-bb6e05390-regular",
            "tyse-v0.2021.24-WIP-bb6e05390-dev",
            "tyse-v0.2021.23-WIP-8ddc736ad-dev",
            "tyse-v0.2021.23-8ddc736ad-regular",
            "tyse-v0.2021.22-WIP-636270da5-dev",
            "tyse-v0.2021.22-636270da5-regular",
            "tyse-v0.2021.21-WIP-15177b939-dev",
            "tyse-v0.2021.21-15177b939-regular",
            "tyse-v0.2021.20-WIP-33a06102f-dev",
            "tyse-v0.2021.20-33a06102f-regular"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-25981.json"
          }
        }
      ],
      "modified": "2026-10-20T10:53:40.756145478Z",
      "provider": "osv",
      "references": [
        "https://github.com/debiki/talkyard/commit/b0310df019887f3464895529c773bc7d85ddcf34",
        "https://github.com/debiki/talkyard/commit/b0712915d8a22a20b09a129924e8a29c25ae5761",
        "https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25981"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-25981",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 384485,
  "published_at": "2022-01-03T07:15:06.943+00:00"
}