BoldThemes Celeste CVE-2026-27369
HIGHSeverity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
3DescriptionCVE.org
Deserialization of Untrusted Data vulnerability in BoldThemes Celeste celeste allows Object Injection.This issue affects Celeste: from n/a through <= 1.3.6.
AnalysisAI
BoldThemes Celeste versions 1.3.6 and earlier are vulnerable to unsafe deserialization that enables arbitrary object injection attacks over the network without authentication. An attacker can exploit this to achieve remote code execution or other malicious operations on affected systems. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Celeste theme version <= 1.3.6 with insecure deserialization handling enabled. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 8.1 (HIGH). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker could exploit this vulnerability to compromise the affected system. |
| Remediation | Monitor vendor advisories for a patch. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all systems running Celeste theme and isolate them or restrict external access if possible; enable enhanced logging and monitoring for suspicious activity. …
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External POC / Exploit Code
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