CVE-2026-77506 (GCVE-0-2026-77506)

Vulnerability from cvelistv5 – Published: 2026-08-20 20:18 – Updated: 2026-08-20 20:18
VLAI
Summary
Znuny before LTS 6.5.22 allows AgentTicketEmailResend template XSS.
Severity
4.8 (Medium)
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
Impacted products
Vendor Product Version CPE status
Znuny Znuny Affected: 6.0 , < 6.5.22 (custom)
    cpe:2.3:a:znuny:znuny:*:*:*:*:*:*:*:*
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            "confidentialityImpact": "LOW",
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      "problemTypes": [
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      "providerMetadata": {
        "dateUpdated": "2026-08-20T20:18:55.670Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
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    "datePublished": "2026-08-20T20:18:55.670Z",
    "dateReserved": "2026-08-20T20:18:55.298Z",
    "dateUpdated": "2026-08-20T20:18:55.670Z",
    "state": "PUBLISHED"
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-77506",
      "date": "2026-08-23",
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  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.