GHSA-hc5c-r8m5-2gfh
LOWplone.restapi vulnerable to Stored Cross Site Scripting with SVG image in user portrait
Blast Radius
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Description
Impact
There is a stored cross site scripting vulnerability for SVG images uploaded in user portraits.
Note that a page that uses an image tag with an SVG image as source is never vulnerable, even when the SVG image contains malicious code. To exploit the vulnerability, an attacker would first need to upload an SVG image as user portrait, and then trick a user into following a link to this portrait.
Patches
A patch will be released in plone.restapi 8.43.3. This version is good for Plone 6.0, and for Plone 5.2 on Python 3.
In plone.restapi 7 or earlier there was no @portrait endpoint yet, so there is nothing to fix in that version. It is still vulnerable to this attack, and needs a fix in Zope 4. These two vulnerabilities share the same CVE: CVE-2023-42458.
Workarounds
You could remove the portrait field from the member data schema, and possibly remove all portraits that are already in the database, but this seems a bit drastic.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | plone-restapi | ≥ 8.0.0&&< 8.43.3 | 8.43.3 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for plone-restapi. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update plone-restapi to 8.43.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-hc5c-r8m5-2gfh is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-hc5c-r8m5-2gfh is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-hc5c-r8m5-2gfh. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-hc5c-r8m5-2gfh in your dependencies?
O3 detects GHSA-hc5c-r8m5-2gfh across PyPI dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.