Description
PhpSpreadsheet is a pure PHP library for reading and writing spreadsheet files. Prior to 1.30.7, 2.1.19, 2.4.8, 3.10.8, and 5.10.0, Worksheet\Drawing::setPath validates only the initial external-image URL with setIsWhitelisted when setAllowExternalImages is enabled. The HTTP stream context permits PHP to follow a redirect without applying the callback to the redirected URL, so a permitted image host can redirect the server to an internal address and cause a blind GET request. The response body is not returned to the attacker because the reader validates the downloaded content as an image and removes the temporary file, but internal GET-driven endpoints, network reachability, and cloud metadata endpoints may be reached. This issue is fixed in versions 1.30.7, 2.1.19, 2.4.8, 3.10.8, and 5.10.0.
References10
- github.com/PHPOffice/PhpSpreadsheet/commit/299993894dce37aa3b64…
- github.com/PHPOffice/PhpSpreadsheet/commit/94590951d76a250a5fc1…
- github.com/PHPOffice/PhpSpreadsheet/commit/980b5c294493856f1a25…
- github.com/PHPOffice/PhpSpreadsheet/commit/9a0b48622ebfe93fa48c…
- github.com/PHPOffice/PhpSpreadsheet/commit/da13f40e8760d599b0e8…
- github.com/PHPOffice/PhpSpreadsheet/releases/tag/1.30.7
- github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.1.19
- github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.4.8
- github.com/PHPOffice/PhpSpreadsheet/releases/tag/3.10.8
- github.com/PHPOffice/PhpSpreadsheet/releases/tag/5.10.0
Metrics
- CVSS 3.1
-
6.4
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N - EPSS — exploit probability
- 0% percentile: 27 · as of 8 November 2026
- CWE
- CWE-863CWE-918
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.