CVE-2020-13258 Cross-site scripting in Contentful
Reflected XSS in the Contentful Python SDK allows attackers to execute arbitrary scripts via the api parameter.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2020-13258?
CVE-2020-13258 is a medium-severity cross-site scripting vulnerability in n/a, published on 21 May 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Contentful through 2020-05-21 for Python allows reflected XSS, as demonstrated by the api parameter to the-example-app.py.
Weakness: CWE-79
Which versions are affected by CVE-2020-13258?
3 open source packages ship an affected version, including contentful. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
contentful PyPI | All versions | 1.12.4 |
contentful PyPI | All versions | 1.12.4 |
contentful PyPI | All versions | 1.12.4 |
Products include Contentful Python Example.
How do I fix CVE-2020-13258?
Upgrade contentful to 1.12.4 or later.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2020-13258 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-13258 exists.
Public exploit code: 1 Nuclei template.
Sources
Also known as GHSA-g5j6-r3x9-gf2m, PYSEC-2026-626.