CVE-2016-10516

Severity: medium (CVSS 6.1 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-10-23 · updated 2026-06-17
Weakness: CWE-79

Description

Cross-site scripting (XSS) vulnerability in the render_full function in debug/tbtools.py in the debugger in Pallets Werkzeug before 0.11.11 (as used in Pallets Flask and other products) allows remote attackers to inject arbitrary web script or HTML via a field that contains an exception message.

Affected products

pallets werkzeug: before 0.11.11 — fixed in 0.11.11

How to fix

Upgrade to a fixed version: pallets werkzeug 0.11.11. Check the vendor advisory for mitigations.

References

http://blog.neargle.com/2016/09/21/flask-src-review-get-a-xss-from-debuger/
https://github.com/pallets/werkzeug/pull/1001
https://lists.debian.org/debian-lts-announce/2017/11/msg00037.html
http://blog.neargle.com/2016/09/21/flask-src-review-get-a-xss-from-debuger/
https://github.com/pallets/werkzeug/pull/1001
https://lists.debian.org/debian-lts-announce/2017/11/msg00037.html

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