CVE-2020-8264
Description
In actionpack gem >= 6.0.0, a possible XSS vulnerability exists when an application is running in development mode allowing an attacker to send or embed (in another page) a specially crafted URL which can allow the attacker to execute JavaScript in the context of the local application. This vulnerability is in the Actionable Exceptions middleware.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 2:6.0.3.4+dfsg-1 |
| sid | Fixed | 2:6.0.3.4+dfsg-1 |
| forky | Fixed | 2:6.0.3.4+dfsg-1 |
| bullseye | Fixed | 2:6.0.3.4+dfsg-1 |
| bookworm | Fixed | 2:6.0.3.4+dfsg-1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| RubyGems | actionpack | !< 6.0.0||<>= 6.0.3.4 | >= 6.0.3.4 |
| RubyGems | actionpack | >=6.0.0,<6.0.3.4 | 6.0.3.4 |
References
- https://groups.google.com/g/rubyonrails-security/c/yQzUVfv42jk
- https://nvd.nist.gov/vuln/detail/CVE-2020-8264
- https://hackerone.com/reports/904059
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/actionpack/CVE-2020-8264.yml
- https://groups.google.com/g/rubyonrails-security/c/yQzUVfv42jk/m/oJWw-xhNAQAJ
- https://security-tracker.debian.org/tracker/CVE-2020-8264
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.