CVE-2022-27777

XSS Vulnerability in Action View tag helpers

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

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.

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.

Untrusted input is rendered as active markup in a victim's browser, which can run script in their session. Typical impact: session or credential theft, and actions taken as the user.

CVE-2022-27777 has a CVSS score of 6.1 (Medium). The vector is network-reachable, no privileges required, and user interaction required. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (5.2.7.1, 6.0.4.8, 6.1.5.1, 7.0.2.4); upgrading removes the vulnerable code path.

Kodem intelligence

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1. What is CVE-2022-27777? CVE-2022-27777 is a medium-severity cross-site scripting (XSS) vulnerability in actionview (rubygems), affecting versions <= 5.2.7.0. It is fixed in 5.2.7.1, 6.0.4.8, 6.1.5.1, 7.0.2.4. Untrusted input is rendered as active markup in a victim's browser, which can run script in their session.
2. How severe is CVE-2022-27777? CVE-2022-27777 has a CVSS score of 6.1 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which versions of actionview are affected by CVE-2022-27777? actionview (rubygems) versions <= 5.2.7.0 is affected.
4. Is there a fix for CVE-2022-27777? Yes. CVE-2022-27777 is fixed in 5.2.7.1, 6.0.4.8, 6.1.5.1, 7.0.2.4. Upgrade to this version or later.
5. Is CVE-2022-27777 exploitable, and should I be worried? Whether CVE-2022-27777 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether CVE-2022-27777 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix CVE-2022-27777?
   • Upgrade actionview to 5.2.7.1 or later
   • Upgrade actionview to 6.0.4.8 or later
   • Upgrade actionview to 6.1.5.1 or later
   • Upgrade actionview to 7.0.2.4 or later

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