CVE-2020-28734 Improper Restriction of XML External Entity Reference in Plone
An attacker with Manager role can exploit an XXE vulnerability in Plone to read sensitive data or execute code.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-28734?
CVE-2020-28734 is a high-severity vulnerability in Plone Plone, published on 30 Dec 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Plone before 5.2.3 allows XXE attacks via a feature that is explicitly only available to the Manager role.
Weakness: CWE-611
Which versions are affected by CVE-2020-28734?
15 open source packages ship an affected version, including plone, Plone and plone-app-dexterity. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
plone PyPI | All versions | 5.2.3 |
plone PyPI | All versions | 5.2.3 |
Plone PyPI | All versions | 5.2.3 |
plone-app-dexterity PyPI | All versions | 2.6.8 |
plone-app-dexterity PyPI | All versions | 2.6.8 |
plone-app-event PyPI | All versions | 3.2.10 |
9 more packages
plone-app-event PyPI | All versions | 3.2.10 |
plone-app-theming PyPI | All versions | 4.1.6 |
plone-app-theming PyPI | All versions | 4.1.6 |
plone-supermodel PyPI | All versions | 1.6.3 |
plone-supermodel PyPI | All versions | 1.6.3 |
plone.app.dexterity PyPI | All versions | 2.6.8 |
plone.app.event PyPI | All versions | 3.2.10 |
plone.app.theming PyPI | All versions | 4.1.6 |
plone.supermodel PyPI | All versions | 1.6.3 |
Products include Plone Plone.
How do I fix CVE-2020-28734?
Upgrade plone to 5.2.3 or later.
Is CVE-2020-28734 being exploited?
There is no known exploitation of CVE-2020-28734 in the wild and no public exploit code.
Other vulnerabilities in Plone Plone
Sources
Also known as GHSA-wq6x-g685-w5f2, PYSEC-2020-246, PYSEC-2026-2880, PYSEC-2026-2883, PYSEC-2026-2886, PYSEC-2026-736.