CVE-2026-78265
WordPress The Events Calendar plugin <= 6.17.2 - PHP Object Injection vulnerability
Unauthenticated PHP Object Injection in The Events Calendar <= 6.17.2 versions.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
WordPress The Events Calendar plugin <= 6.17.2 - PHP Object Injection vulnerability
Unauthenticated PHP Object Injection in The Events Calendar <= 6.17.2 versions.
- Record
CVE-2026-78265- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-502
- Updated
- 2026-11-02
EUVDEUVD-2026-65172
Unauthenticated PHP Object Injection in The Events Calendar <= 6.17.2 versions.
- Record
EUVD-2026-65172- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-9prr-67qp-hf9r
Unauthenticated PHP Object Injection in The Events Calendar <= 6.17.2 versions.
Unauthenticated PHP Object Injection in The Events Calendar <= 6.17.2 versions.
- Record
GHSA-9prr-67qp-hf9r- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-502
- Updated
- 2026-11-02
NVD
Unauthenticated PHP Object Injection in The Events Calendar <= 6.17.2 versions.
- Record
CVE-2026-78265- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-502
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, products, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-78265 is a critical vulnerability (CVSS 9.8) in Nexcess The Events Calendar, published August 24, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.56%, the 47th percentile. No source names a fixed version.