CVE-2020-7937 Plone cross site scripting (XSS)
Privileged users can inject JavaScript into Plone titles, leading to script execution for other site visitors.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2020-7937?
CVE-2020-7937 is a medium-severity cross-site scripting vulnerability in Plone Plone, published on 23 Jan 2020. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
An XSS issue in the title field in Plone 5.0 through 5.2.1 allows users with a certain privilege level to insert JavaScript that will be executed when other users access the site.
Weakness: CWE-79
Which versions are affected by CVE-2020-7937?
3 open source packages ship an affected version, including plone and Plone. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
plone PyPI | From 5.0 to 5.2.1 | None |
plone PyPI | From 5.0 | 5.2.2 |
Plone PyPI | From 5.0 to 5.2.1 | None |
Products include Plone Plone.
How do I fix CVE-2020-7937?
Upgrade plone to 5.2.2 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-2020-7937 being exploited?
There is no known exploitation of CVE-2020-7937 in the wild and no public exploit code.
Other vulnerabilities in Plone Plone
Sources
Also known as GHSA-8mc4-2xrc-g582, PYSEC-2020-86.