Products.CMFPlone Open Redirect VulnerabilityGHSA-8g72-gq68-6gqh
MEDIUMFix: plone/Products.CMFPlone#2233GHSA-8g72-gq68-6gqh is a medium-severity (CVSS 6.1) Open Redirect vulnerability in products-cmfplone. A fix is available for products-cmfplone — see the affected versions and patch details below.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
products-cmfplone🐍products-cmfplone🐍products-cmfplone🐍plone🐍ploneReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.
Description
When you visit a page where you need to login, Plone 2.5-5.1rc1 sends you to the login form with a 'came_from' parameter set to the previous url. After you login, you get redirected to the page you tried to view before. An attacker might try to abuse this by letting you click on a specially crafted link. You would login, and get redirected to the site of the attacker, letting you think that you are still on the original Plone site. Or some javascript of the attacker could be executed. Most of these types of attacks are already blocked by Plone, using the isURLInPortal check to make sure we only redirect to a page on the same Plone site. But a few more ways of tricking Plone into accepting a malicious link were discovered, and fixed with this hotfix.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | products-cmfplone | all versions | 4.3.17pip install --upgrade 'products-cmfplone==4.3.17' |
| 🐍PyPI | products-cmfplone | ≥ 5.0.0&&< 5.0.10 | 5.0.10pip install --upgrade 'products-cmfplone==5.0.10' |
| 🐍PyPI | products-cmfplone | ≥ 5.1a1&&< 5.1.0 | 5.1.0pip install --upgrade 'products-cmfplone==5.1.0' |
| 🐍PyPI | plone | ≥ 2.5&&< 4.3.16 | 4.3.16pip install --upgrade 'plone==4.3.16' |
| 🐍PyPI | plone | ≥ 5&&< 5.1.0 | 5.1.0pip install --upgrade 'plone==5.1.0' |
Affected Products
ploneploneDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for products-cmfplone, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update products-cmfplone to 4.3.17 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-8g72-gq68-6gqh is resolved across your whole dependency graph.
Workarounds
Stop reflecting attacker-controlled destinations: resolve every redirect target against an allowlist of paths or hosts you own, prefer a server-side key over a full URL in the request, and reject absolute URLs entirely where the flow only ever needs a relative one.
Frequently Asked Questions
Is GHSA-8g72-gq68-6gqh in your dependencies?
Find it across PyPI, including transitive dependencies.