XSS in Torchbox Wagtail
CVE-2021-29434
Wagtail is a Django content management system. In affected versions of Wagtail, when saving the contents of a rich text field in the admin interface, Wagtail does not apply server-side checks to ensure that link URLs use a valid protocol. A malicious user with access to the admin interface could thus craft a POST request to publish content with `javascript:` URLs containing arbitrary code. The vulnerability is not exploitable by an ordinary site visitor without access to the Wagtail admin. See referenced GitHub advisory for additional details, including a workaround. Patched versions have been released as Wagtail 2.11.7 (for the LTS 2.11 branch) and Wagtail 2.12.4 (for the current 2.12 branch).
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.006 (47.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 47.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Torchbox Wagtail
- Wagtail — versions <= 2.11.6, >= 2.12, <= 2.12.3
Weakness classification (CWE)
References
- github.com/wagtail/wagtail/security/advisories/GHSA-wq5h-f9p5-q7fx (Third Party Advisory, Mitigation)
- pypi.org/project/wagtail/ (Product, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-29434?
- CVE-2021-29434 is a medium-severity vulnerability in Torchbox Wagtail, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-04-19.
- How severe is CVE-2021-29434?
- Medium severity. CVSS v3 base score is 6.1 out of 10.