CVE-2026-2811Public exploitNetwork attack vector

Unauthenticated arbitrary header injection via WPACUnapproved

Published Sep 2, 2026 · Updated Sep 2, 2026

HTTP header injection in DLX Plugins Ajaxify Comments before 3.2 allows remote attackers to inject arbitrary headers into responses. The WPACUnapproved query value is returned in the X-WPAC-UNAPPROVED response header without sufficient sanitization or escaping. No account is required, but exploitation requires user interaction, and the published proof of concept is documented only for PHP before 8.

CVSS severity5.4
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

HTTP header injection in DLX Plugins Ajaxify Comments before 3.2 allows remote attackers to inject arbitrary headers into responses. The WPACUnapproved query value is returned in the X-WPAC-UNAPPROVED response header without sufficient sanitization or escaping. No account is required, but exploitation requires user interaction, and the published proof of concept is documented only for PHP before 8.

The record

CVE
CVE-2026-2811
Published
Sep 2, 2026
Updated
Sep 2, 2026
Vendor
DLX Plugins
Product
Ajaxify Comments
Classifications
CWE-113, CAPEC-34
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 2, 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 <3.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

DLX Plugins · Ajaxify Commentsversion=0 <3.2

Published CVSS scores

5.4WPScan CNACVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/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.

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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-113Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting')
CAPEC-34HTTP Response Splitting

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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