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    2 vulnerabilities found for nicknames by flarum

    CVE-2026-30913 (GCVE-0-2026-30913)

    Vulnerability from nvd – Published: 2026-03-09 22:42 – Updated: 2026-03-10 14:17
    VLAI
    Title
    flarum/nickname: Display name injection in notification emails (autolink & markdown)
    Summary
    Flarum is open-source forum software. When the flarum/nicknames extension is enabled, a registered user can set their nickname to a string that email clients interpret as a hyperlink. The nickname is inserted verbatim into plain-text notification emails, and recipients may be misled into visiting attacker-controlled domains.
    Severity
    4.6 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
    SSVC
    Exploitation: poc Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
    Assigner
    References
    Impacted products
    Vendor Product Version
    flarum nicknames Affected: < 1.8.3
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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                "id": "CVE-2026-30913",
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            "url": "https://github.com/flarum/framework/security/advisories/GHSA-3c4m-j3g4-hh25"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "nicknames",
          "vendor": "flarum",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.8.3"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Flarum is open-source forum software. When the flarum/nicknames extension is enabled, a registered user can set their nickname to a string that email clients interpret as a hyperlink. The nickname is inserted verbatim into plain-text notification emails, and recipients may be misled into visiting attacker-controlled domains."
        }
      ],
      "metrics": [
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      },
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        {
          "name": "https://github.com/flarum/framework/security/advisories/GHSA-3c4m-j3g4-hh25",
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            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/flarum/framework/security/advisories/GHSA-3c4m-j3g4-hh25"
        },
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          "name": "https://github.com/flarum/nicknames/commit/4dde99729abdce8f6e2a7437c86e38735fdcca28",
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        "advisory": "GHSA-3c4m-j3g4-hh25",
        "discovery": "UNKNOWN"
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      "title": "flarum/nickname: Display name injection in notification emails (autolink \u0026 markdown)"
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    CVE-2026-30913 (GCVE-0-2026-30913)

    Vulnerability from cvelistv5 – Published: 2026-03-09 22:42 – Updated: 2026-03-10 14:17
    VLAI
    Title
    flarum/nickname: Display name injection in notification emails (autolink & markdown)
    Summary
    Flarum is open-source forum software. When the flarum/nicknames extension is enabled, a registered user can set their nickname to a string that email clients interpret as a hyperlink. The nickname is inserted verbatim into plain-text notification emails, and recipients may be misled into visiting attacker-controlled domains.
    Severity
    4.6 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
    SSVC
    Exploitation: poc Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
    Assigner
    References
    Impacted products
    Vendor Product Version
    flarum nicknames Affected: < 1.8.3
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "nicknames",
          "vendor": "flarum",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.8.3"
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        }
      ],
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      ],
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      "title": "flarum/nickname: Display name injection in notification emails (autolink \u0026 markdown)"
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