CVE-2024-47374Public exploitNetwork attack vector

Stored XSS via unsanitized vary header

Published Oct 5, 2024 · Updated Apr 28, 2026

Stored XSS in LiteSpeed Cache for WordPress 6.5.0.2 and earlier allows remote attackers to inject scripts through an HTTP header. The Page Optimization queue records the unsanitized X-LSCACHE-VARY-VALUE header and renders it without safe output encoding in the administrative queue display. CSS Combine and Generate UCSS must be enabled, and execution occurs when a privileged user opens the affected queue view.

CVSS severity7.1
High
EPSS probability1.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in LiteSpeed Cache for WordPress 6.5.0.2 and earlier allows remote attackers to inject scripts through an HTTP header. The Page Optimization queue records the unsanitized X-LSCACHE-VARY-VALUE header and renders it without safe output encoding in the administrative queue display. CSS Combine and Generate UCSS must be enabled, and execution occurs when a privileged user opens the affected queue view.

The record

CVE
CVE-2024-47374
Published
Oct 5, 2024
Updated
Apr 28, 2026
Vendor
LiteSpeed Technologies
Product
LiteSpeed Cache for WordPress
Classifications
CWE-79, CAPEC-592, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 5, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 2026Record 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=0 <=6.5.0.2 changes=[{"at":"6.5.1","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

LiteSpeed Technologies · LiteSpeed Cache for WordPressversion=0 <=6.5.0.2 changes=[{"at":"6.5.1","status":"unaffected"}]

Published CVSS scores

7.1PatchstackCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

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')
CAPEC-592Stored XSS
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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