CVE-2018-19277

HIGHNVD 8.8

8.8

securityScan() in PHPOffice PhpSpreadsheet through 1.5.0 allows a bypass of protection mechanisms for XXE via UTF-7 encoding in a .xlsx file

CVSS v3: 8.8
EG Score: —
EPSS: 87.1%
KEV: Not listed

Published

November 14, 2018

Last Modified

November 21, 2024

References (8)

cve@mitrehttps://github.com/MewesK/TwigSpreadsheetBundle/issues/18
cve@mitrehttps://github.com/PHPOffice/PhpSpreadsheet/issues/771
cve@mitrehttps://www.bishopfox.com/news/2018/11/phpoffice-versions/
cve@mitrehttps://www.drupal.org/sa-contrib-2021-043
af854a3a-2127-422b-91ae-364da2661108https://github.com/MewesK/TwigSpreadsheetBundle/issues/18
af854a3a-2127-422b-91ae-364da2661108https://github.com/PHPOffice/PhpSpreadsheet/issues/771
af854a3a-2127-422b-91ae-364da2661108https://www.bishopfox.com/news/2018/11/phpoffice-versions/
af854a3a-2127-422b-91ae-364da2661108https://www.drupal.org/sa-contrib-2021-043

Affected Packages

(2 across 1 ecosystem)

Packagist(2)

Package	Vulnerable range	Fixed in	Dependents
phpoffice/phpexcel	1.7.9 ... 1.8.1 (8 versions)	1.8.2	—
phpoffice/phpspreadsheet	1.0.0 ... 1.5.0 (11 versions)	1.5.1	—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-91XML Injection

Data Freshness Timeline

(refreshed 6× in last 7d / 6× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2018-19277?

CVE-2018-19277 is a high vulnerability published on November 14, 2018. securityScan() in PHPOffice PhpSpreadsheet through 1.5.0 allows a bypass of protection mechanisms for XXE via UTF-7 encoding in a .xlsx file

When was CVE-2018-19277 disclosed?

CVE-2018-19277 was first published in the National Vulnerability Database on November 14, 2018, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2018-19277 actively exploited?

CVE-2018-19277 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 87.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2018-19277?

CVE-2018-19277 has a CVSS v3 base score of 8.8 (NVD).

How do I remediate CVE-2018-19277?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-19277, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2018-19277

Explore →

Is Your Infrastructure Affected by CVE-2018-19277?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs