CVE-2024-28199

Cross-site Scripting (XSS) possible with maliciously formed HTML attribute names and values in Phlex

MEDIUM

6.1

CVSS Score

Published: March 11, 2024 at 10:50 PM UTC

Updated: June 17, 2026 at 07:21 AM UTC

2 products affected across 2 vendorsPhlexPhlex

Using phlex by phlex-ruby?

Get instant alerts when new vulnerabilities affect phlex - before attackers find them.

Real-time alertsTrack your software stackFree plan available

Start Free Sign In

Severity

MEDIUM6.1

Exploit prediction

EPSS 0.6%

SSVC

No known exploit

Description

phlex is an open source framework for building object-oriented views in Ruby. There is a potential cross-site scripting (XSS) vulnerability that can be exploited via maliciously crafted user data. This was due to improper case-sensitivity in the code that was meant to prevent these attacks. If you render an `<a>` tag with an `href` attribute set to a user-provided link, that link could potentially execute JavaScript when clicked by another user. If you splat user-provided attributes when rendering any HTML tag, malicious event attributes could be included in the output, executing JavaScript when the events are triggered by another user. Patches are available on RubyGems for all 1.x minor versions. Users are advised to upgrade. Users unable to upgrade should consider configuring a content security policy that does not allow `unsafe-inline`.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Phlex · Phlexrubygems

95%

v < 1.0.11.2.0 ≤ v < 1.2.21.3.0 ≤ v < 1.3.31.1.0 1.4.0 1.7.0 1.9.0

Affected range stops below 1.0.1, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.2.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.3.3, so it looks safe — our inference, not a vendor statement

Phlex · Phlex Rubyrubygems

60%

v < 1.0.1v < 1.2.2v < 1.3.3v < 1.5.2v < 1.6.2v < 1.8.2= 1.1.0 = 1.4.0 = 1.7.0 = 1.9.0

Affected range stops below 1.0.1, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.2.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.3.3, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.5.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.6.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.8.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (4)

x_refsource_MISCTechnical Description

Source: [email protected]

https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy

x_refsource_MISCTechnical Description

Source: [email protected]

https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy#unsafe-inline

x_refsource_MISCPatch

Source: [email protected]

https://github.com/phlex-ruby/phlex/commit/aa50c604cdee1d0ce7ef068a4c66cbd5d43f96a1

x_refsource_CONFIRMPatchVendor Advisory

Source: [email protected]

https://github.com/phlex-ruby/phlex/security/advisories/GHSA-242p-4v39-2v8g

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.1MEDIUM[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: REQUIRED
Scope: CHANGED
Confidentiality: LOW
Integrity: LOW
Availability: NONE

Vector?

Quick Info

StatusANALYZED

CWE

CWE-79

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create account Sign in

Free plan, no card