CVE-2022-27777 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in actionview. 1 public exploit reference exists, so weaponization risk is real. A fix is available for actionview — see the affected versions and patch details below.
XSS Vulnerability in Action View tag helpers
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
CVE-2022-27777 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 378,567 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
actionview💎actionview💎actionview💎actionviewReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects RubyGems packages — download data is not available via public APIs for these ecosystems.
Description
There is a possible XSS vulnerability in Action View tag helpers. Passing untrusted input as hash keys can lead to a possible XSS vulnerability. This vulnerability has been assigned the CVE identifier CVE-2022-27777.
Versions Affected: ALL Not affected: NONE Fixed Versions: 7.0.2.4, 6.1.5.1, 6.0.4.8, 5.2.7.1
Impact
If untrusted data is passed as the hash key for tag attributes, there is a possibility that the untrusted data may not be properly escaped which can lead to an XSS vulnerability.
Impacted code will look something like this:
check_box_tag('thename', 'thevalue', false, aria: { malicious_input => 'thevalueofaria' })
Where the "malicious_input" variable contains untrusted data.
All users running an affected release should either upgrade or use one of the workarounds immediately.
Releases
The FIXED releases are available at the normal locations.
Workarounds
Escape the untrusted data before using it as a key for tag helper methods.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 💎RubyGems | actionview | all versions | 5.2.7.1bundle update actionview --conservative |
| 💎RubyGems | actionview | ≥ 6.0.0&&< 6.0.4.8 | 6.0.4.8bundle update actionview --conservative |
| 💎RubyGems | actionview | ≥ 6.1.0&&< 6.1.5.1 | 6.1.5.1bundle update actionview --conservative |
| 💎RubyGems | actionview | ≥ 7.0.0&&< 7.0.2.4 | 7.0.2.4bundle update actionview --conservative |
Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for actionview, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update actionview to 5.2.7.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2022-27777 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 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2022-27777 can be triaged on real exposure rather than presence alone.
Tailored to CVE-2022-27777. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Fixing This On Your OS
If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.
| Product | Fixed in | Advisory |
|---|---|---|
| Red Hat Satellite 6.13 for RHEL 8 | tfm-rubygem-actionview-0:6.1.7-1.el8sat | RHSA-2023:2097 |
Frequently Asked Questions
Is CVE-2022-27777 in your dependencies?
O3 Security finds CVE-2022-27777 across RubyGems dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.