Vulnerability details

CVE-2026-114403

PHPOffice PHPPresentation

PHPOffice PHPPresentation through 1.2.0 Deserialization via Reader\Serialized::load

CVSS 4.0

9.2Critical

Official description

PHPOffice PHPPresentation through 1.2.0 contains an insecure deserialization vulnerability that allows attackers to instantiate arbitrary PHP objects by supplying a crafted presentation file. Attackers can upload a ZIP containing PhpPresentation.xml that IOFactory::load passes to unserialize(), enabling gadget-chain code execution, file writes, or denial of service.

CVSS scores

Score	Version	Source	Vector
9.2Critical	4.0	CVEProject cvelistV5 (CNA) (VulnCheck)	`CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`
8.1High	3.1	CVEProject cvelistV5 (CNA) (VulnCheck)	`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`

Affected products

Vendor	Product	Versions	Source
PHPOffice	PHPPresentation	v ≤ 1.2.0	CVEProject cvelistV5 (CNA)

References and advisories

https://github.com/PHPOffice/PHPPresentation/blob/1.2.0/src/PhpPresentation/Reader/Serialized.php#L77-L109 technical-description
https://github.com/PHPOffice/PHPPresentation/blob/1.2.0/src/PhpPresentation/IOFactory.php#L39 technical-description
https://github.com/PHPOffice/PHPPresentation product
https://www.vulncheck.com/advisories/phpoffice-phppresentation-through-1.2.0-deserialization-via-reader-serialized-load third-party-advisory
https://hackmd.io/@leediay/multiple_vulnerable_phppresentation third-party-advisory

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Details

Published: 2026-10-21
Last updated: 2026-10-28
State: Published
Assigner (CNA): VulnCheck
Kolun priority: 27 · Low

Exploit prediction (EPSS)

0.7%

Probability of exploitation in 30 days

53.4%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: Proof of concept
Technical impact: Total

Weaknesses (CWE)

CWE-502
Deserialization of Untrusted Data