CVE-2026-16570Network attack vector

Reflected XSS via unescaped callback parameters

Published Aug 19, 2026 · Updated Aug 19, 2026

Cross-site scripting in NextScripts: Social Networks Auto-Poster before 4.4.8 allows remote attackers to run script in an admin browser via a crafted link. The Facebook OAuth callback on an admin page reflects query-string parameters into page output without escaping, so attacker-controlled script executes in the logged-in user's WordPress origin. Exploitation requires a logged-in user, such as an administrator, to open the crafted URL; published records describe browser-side script execution in that session, not direct server-side code execution.

CVSS severity7.1
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in NextScripts: Social Networks Auto-Poster before 4.4.8 allows remote attackers to run script in an admin browser via a crafted link. The Facebook OAuth callback on an admin page reflects query-string parameters into page output without escaping, so attacker-controlled script executes in the logged-in user's WordPress origin. Exploitation requires a logged-in user, such as an administrator, to open the crafted URL; published records describe browser-side script execution in that session, not direct server-side code execution.

The record

CVE
CVE-2026-16570
Published
Aug 19, 2026
Updated
Aug 19, 2026
Vendor
NextScripts Corp
Product
NextScripts: Social Networks Auto-Poster
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 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 <4.4.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

NextScripts Corp · NextScripts: Social Networks Auto-Posterversion=0 <4.4.8

Published CVSS scores

7.1CISA-ADPCVSS: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 exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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