CVE-2017-18343
The debug handler in Symfony before v2.7.33, 2.8.x before v2.8.26, 3.x before v3.2.13, and 3.3.x before v3.3.6 has XSS via an array key during exception pretty printing in ExceptionHandler.php, as demonstrated by a /_debugbar/open?op=get URI.
Does this matter?
Lower severity and a low EPSS score (6.11%). Track it; it rarely justifies an emergency change on its own.
Description
The debug handler in Symfony before v2.7.33, 2.8.x before v2.8.26, 3.x before v3.2.13, and 3.3.x before v3.3.6 has XSS via an array key during exception pretty printing in ExceptionHandler.php, as demonstrated by a /_debugbar/open?op=get URI. NOTE: the vendor's position is that this is not a vulnerability because the debug tools are not intended for production use. NOTE: the Symfony Debug component is used by Laravel Debugbar
- CVSS 3.0
- 6.1 MEDIUMCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 6.11% probability · 93th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- sensiolabs/symfony
- Source
- cve@mitre.org
References
- https://github.com/barryvdh/laravel-debugbar/issues/850Exploit, Third Party Advisory
- https://github.com/symfony/debug/pull/7/commits/e48bda29143bd1a83001780b4a78e483822d985cPatch, Third Party Advisory
- https://github.com/symfony/symfony/issues/27987Exploit, Third Party Advisory
- https://github.com/symfony/symfony/pull/23684Third Party Advisory
- https://github.com/barryvdh/laravel-debugbar/issues/850Exploit, Third Party Advisory
- https://github.com/symfony/debug/pull/7/commits/e48bda29143bd1a83001780b4a78e483822d985cPatch, Third Party Advisory
- https://github.com/symfony/symfony/issues/27987Exploit, Third Party Advisory
- https://github.com/symfony/symfony/pull/23684Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.