CVE-2022-26616Network attack vector

Reflected XSS via unchecked Host headers

Published Apr 4, 2022 · Updated Aug 3, 2024

Reflected XSS in PKP Open Journal Systems 2.4.8 through 3.3.0-8 allows remote attackers to run script via crafted HTTP headers. The request logic trusts HTTP_HOST, SERVER_NAME, and HTTP_X_FORWARDED_HOST when formulating absolute URLs without checking an allowed-host list. A victim must follow or render a response incorporating the attacker-controlled host; public materials do not identify the exact reflection sink.

CVSS severity6.1
Medium
EPSS probability1.01%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in PKP Open Journal Systems 2.4.8 through 3.3.0-8 allows remote attackers to run script via crafted HTTP headers. The request logic trusts HTTP_HOST, SERVER_NAME, and HTTP_X_FORWARDED_HOST when formulating absolute URLs without checking an allowed-host list. A victim must follow or render a response incorporating the attacker-controlled host; public materials do not identify the exact reflection sink.

The record

CVE
CVE-2022-26616
Published
Apr 4, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 4, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

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