CVE-2022-27777Public exploitNetwork attack vector

Script injection via unescaped attribute hash keys

Published May 26, 2022 · Updated Aug 3, 2024

Cross-site scripting in affected Ruby on Rails Action View releases allows remote attackers to inject script through tag helpers. Tag helpers serialize hash keys as HTML attribute names without properly escaping attacker-controlled characters. Exploitation requires an application to use attacker-controlled data as a tag-attribute hash key and a user to render the output, enabling script execution in that user's browser.

CVSS severity6.1
Medium
EPSS probability1.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in affected Ruby on Rails Action View releases allows remote attackers to inject script through tag helpers. Tag helpers serialize hash keys as HTML attribute names without properly escaping attacker-controlled characters. Exploitation requires an application to use attacker-controlled data as a tag-attribute hash key and a user to render the output, enabling script execution in that user's browser.

The record

CVE
CVE-2022-27777
Published
May 26, 2022
Updated
Aug 3, 2024
Vendor
Ruby on Rails
Product
Ruby on Rails
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 26, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=7.0.2.4, 6.1.5.1, 6.0.4.8, 5.2.7.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Ruby on Rails · Ruby on Railsversion=7.0.2.4, 6.1.5.1, 6.0.4.8, 5.2.7.1

Published CVSS scores

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
6.1GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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