XXE in PHPSpreadsheet's XLSX reader
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 1.29.4, 2.1.3, 2.3.2, 3.4.0
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: yes
- Technical impact: partial
Summary
PhpSpreadsheet is a PHP library for reading and writing spreadsheet files. The `XmlScanner` class has a scan method which should prevent XXE attacks. However, in a bypass of the previously reported `CVE-2024-47873`, the regexes from the `findCharSet` method, which is used for determining the current encoding can be bypassed by using a payload in the encoding UTF-7, and adding at end of the file a comment with the value `encoding="UTF-8"` with `"`, which is matched by the first regex, so that `encoding='UTF-7'` with single quotes `'` in the XML header is not matched by the second regex. An attacker can bypass the sanitizer and achieve an XML external entity attack. Versions 1.9.4, 2.1.3, 2.3.2, and 3.4.0 fix the issue.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: yes · Technical impact: partial
- Record last updated
Affected versions
- PHPOffice PhpSpreadsheet
fixed in 1.29.4; From 2.0.0 · fixed in 2.1.3; From 2.2.0 · fixed in 2.3.2; From 3.3.0 · fixed in 3.4.0
- phpoffice/phpspreadsheetPackagist
fixed in 1.29.4
- phpoffice/phpspreadsheetPackagist
From 2.0.0 · fixed in 2.1.3
- phpoffice/phpspreadsheetPackagist
From 2.2.0 · fixed in 2.3.2
- phpoffice/phpspreadsheetPackagist
From 3.3.0 · fixed in 3.4.0
- phpoffice/phpexcelPackagist
through 1.8.2