CVE-2023-37874Network attack vector

Admin stored cross-site scripting

Published Aug 5, 2023 · Updated Apr 28, 2026

Stored cross-site scripting in HTTP Headers 1.18.11 and earlier allows remote authenticated users to execute script via WordPress admin pages. The specific settings field or rendering locus responsible for storing and emitting the payload has not been publicly disclosed in the CVE record or vendor material. Administrator-level access and a victim viewing the affected page are required, so the bounded impact is script execution in the victim’s browser with limited confidentiality, integrity, and availability effects.

CVSS severity4.8
Medium
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in HTTP Headers 1.18.11 and earlier allows remote authenticated users to execute script via WordPress admin pages. The specific settings field or rendering locus responsible for storing and emitting the payload has not been publicly disclosed in the CVE record or vendor material. Administrator-level access and a victim viewing the affected page are required, so the bounded impact is script execution in the victim’s browser with limited confidentiality, integrity, and availability effects.

The record

CVE
CVE-2023-37874
Published
Aug 5, 2023
Updated
Apr 28, 2026
Vendor
Dimitar Ivanov
Product
HTTP Headers
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 5, 2023CVE 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=n/a <=1.18.11 changes=[{"at":"1.19.0","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Dimitar Ivanov · HTTP Headersversion=n/a <=1.18.11 changes=[{"at":"1.19.0","status":"unaffected"}]

Published CVSS scores

5.9PatchstackCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L
4.8NVDCVSS:3.1/AV:N/AC:L/PR:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

Public exploit references

No public exploit references are available in this record.

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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