yii2-authclient vulnerable to possible timing attack on string comparison in OAuth1, OAuth2 and OpenID Connect implementation

{
  "id": "ca836c79461d9b91c9f9bbde5f4177b442a958565a4df21d440a0567b7302a1b",
  "url": "https://osv.dev/vulnerability/CVE-2023-50708",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "yii2-authclient vulnerable to possible timing attack on string comparison in OAuth1, OAuth2 and OpenID Connect implementation",
    "summary": "yii2-authclient is an extension that adds OpenID, OAuth, OAuth2 and OpenId Connect consumers for the Yii framework 2.0. In yii2-authclient prior to version 2.2.15, the Oauth1/2 `state` and OpenID Connect `nonce` is vulnerable for a `timing attack` since it is compared via regular string comparison (instead of `Yii::$app->getSecurity()->compareString()`). Version 2.2.15 contains a patch for the issue. No known workarounds are available.",
    "evidence": "osv:CVE-2023-50708",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2023-50708",
      "aliases": [
        "CVE-2023-50708",
        "GHSA-w8vh-p74j-x9xp"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/yiisoft/yii2-authclient",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "a11cbb065a2424c25f9dc0d0df6852d605d869b2"
                },
                {
                  "fixed": "dabddf2154ab7e7703740205a069202554089248"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:yiiframework:yii2-authclient:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.2.15"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "dabddf2154ab7e7703740205a069202554089248"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.2.14",
            "2.2.13",
            "2.2.12",
            "2.2.11",
            "2.2.10",
            "2.2.9",
            "2.2.8",
            "2.2.7",
            "2.2.6",
            "2.2.4",
            "2.2.3",
            "2.2.2",
            "2.2.1",
            "2.2.0",
            "2.1.8",
            "2.1.7",
            "2.1.6",
            "2.1.5",
            "2.1.4",
            "2.1.3",
            "2.1.2",
            "2.1.1",
            "2.1.0",
            "2.0.6",
            "2.0.5",
            "2.0.4",
            "2.0.3",
            "2.0.2",
            "2.0.1",
            "2.0.0",
            "2.0.0-rc",
            "2.0.0-beta"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-50708.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:46.727814120Z",
      "provider": "osv",
      "references": [
        "https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OAuth1.php#L158",
        "https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OAuth2.php#L121",
        "https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OpenIdConnect.php#L420",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/50xxx/CVE-2023-50708.json",
        "https://github.com/yiisoft/yii2-authclient/security/advisories/GHSA-w8vh-p74j-x9xp",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-50708",
        "https://github.com/yiisoft/yii2-authclient/commit/dabddf2154ab7e7703740205a069202554089248"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-203"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/50xxx/CVE-2023-50708.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-50708",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 514561,
  "published_at": "2023-12-22T18:25:01.925+00:00"
}