How severe is CVE-2022-27777?

CVE-2022-27777 has a CVSS score of 6.1/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2022-27777?

CVE-2022-27777 affects the following packages: actionview (RubyGems), actionview (RubyGems), actionview (RubyGems), actionview (RubyGems). Ecosystems affected: RubyGems.

How do I fix CVE-2022-27777?

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.

How do I detect CVE-2022-27777 in my RubyGems dependencies?

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.

How do I mitigate CVE-2022-27777 if there is no patch (or I can't update yet)?

Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Is CVE-2022-27777 actively exploited in the wild?

Yes. There are 1 known exploit references for CVE-2022-27777, including 1 in-the-wild exploitation observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2022-27777?

CVE-2022-27777 has an EPSS (Exploit Prediction Scoring System) score of 1.7%, placing it in the 77th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2022-27777?

CVE-2022-27777 is classified as Cross-site Scripting (XSS) (CWE-79). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2022-27777 published, and has it been updated?

CVE-2022-27777 was published on May 26, 2022 and was last updated on March 14, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

💎

💎 RubyGems

Not in CISA KEV

MEDIUM severity

CVE-2022-27777 — actionview

MEDIUMFix: rails/rails@649516c

CVE-2022-27777 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in actionview. 1 public exploit or proof-of-concept reference is indexed, 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

Also known asGHSA-ch3h-j2vf-95pv

Published

May 26, 2022

Updated

Mar 14, 2026

Affected

4 pkgs

Patched

4 / 4

Exploits

1 known

Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

1.7%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs77th percentile — riskier than 77% of all scored CVEsHighest risk

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

4 pkgs affected

💎actionview💎actionview💎actionview💎actionview

Real-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

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

4 total 4 fixed

Ecosystem	Package	Vulnerable range	Fix
💎RubyGems	`actionview`	all versions	5.2.7.1`bundle update actionview --conservative`
💎RubyGems	`actionview`	≥ 6.0.0&&< 6.0.4.8	6.0.4.8`bundle update actionview --conservative`
💎RubyGems	`actionview`	≥ 6.1.0&&< 6.1.5.1	6.1.5.1`bundle update actionview --conservative`
💎RubyGems	`actionview`	≥ 7.0.0&&< 7.0.2.4	7.0.2.4`bundle update actionview --conservative`

Affected Products

2 products · 5 configurations

debian linuxdebian

1 version

10.0

Application

actionpackrubyonrails

≥ 7.0.0 && < 7.0.2.4

range

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

A XSS Vulnerability in Action View tag helpers >= 5.2.0 and < 5.2.0 whic…

discuss.rubyonrails.orgNVDJun 2022

Detection & mitigation playbook

Open-source dependency

Detect
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
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

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.

Red HatModerate

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

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',