Stored XSS via attribute in convos

{
  "id": "7b7ef1534700bab98a2baeb7b922eb972fc1c502f13985664483b8f751bcf68b",
  "url": "https://osv.dev/vulnerability/CVE-2022-21649",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Stored XSS via attribute in convos",
    "summary": "Convos is an open source multi-user chat that runs in a web browser. Characters starting with \"https://\" in the chat window create an tag. Stored XSS vulnerability using onfocus and autofocus occurs because escaping exists for \"<\" or \">\" but escaping for double quotes does not exist. Through this vulnerability, an attacker is capable to execute malicious scripts. Users are advised to update as soon as possible.",
    "evidence": "osv:CVE-2022-21649",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2022-21649",
      "aliases": [
        "CVE-2022-21649",
        "GHSA-xmpj-xwm3-vww7"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/convos-chat/convos",
              "type": "GIT",
              "events": [
                {
                  "introduced": "02ed03da300bcc1c2a3fea6941b5952c666d8deb"
                },
                {
                  "fixed": "794ab7d2273327829230bfa96b5b3126b0547bb1"
                },
                {
                  "fixed": "86b2193de375005ba71d9dd53843562c6ac1847c"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "6.49"
                      },
                      {
                        "fixed": "6.52"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "86b2193de375005ba71d9dd53843562c6ac1847c"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v6.51",
            "v6.50",
            "v6.49"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-21649.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.139336725Z",
      "provider": "osv",
      "references": [
        "https://www.huntr.dev/bounties/4532a0ac-4e7c-4fcf-9fe3-630e132325c0/",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/21xxx/CVE-2022-21649.json",
        "https://github.com/convos-chat/convos/security/advisories/GHSA-xmpj-xwm3-vww7",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-21649",
        "https://github.com/convos-chat/convos/commit/86b2193de375005ba71d9dd53843562c6ac1847c",
        "https://blog.pocas.kr/2021/12/30/2021-12-30-s-xss-convos-chat/#Second-vulnerability"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-79"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/21xxx/CVE-2022-21649.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-21649",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 490437,
  "published_at": "2022-01-04T20:40:20+00:00"
}