CVE-2026-15283Network attack vector

Stored XSS via unsanitized admin settings

Published Jul 10, 2026 · Updated Jul 10, 2026

Stored XSS in WPvivid Backup for MainWP 0.9.33 and earlier allows remote authenticated users to inject script through admin settings. The plugin saves administrator-supplied setting values without sufficient sanitization and later renders them without output escaping, so script markup executes in pages displaying the stored values. An administrator-level account and either a multisite installation or disabled unfiltered_html are required; executed script can read or alter data in a viewer's WordPress session.

CVSS severity4.4
Medium
EPSS probability0.24%
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 WPvivid Backup for MainWP 0.9.33 and earlier allows remote authenticated users to inject script through admin settings. The plugin saves administrator-supplied setting values without sufficient sanitization and later renders them without output escaping, so script markup executes in pages displaying the stored values. An administrator-level account and either a multisite installation or disabled unfiltered_html are required; executed script can read or alter data in a viewer's WordPress session.

The record

CVE
CVE-2026-15283
Published
Jul 10, 2026
Updated
Jul 10, 2026
Vendor
WPvivid Plugins
Product
WPvivid Backup for MainWP
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jul 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 10, 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 <=0.9.33

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

WPvivid Plugins · WPvivid Backup for MainWPversion=0 <=0.9.33

Published CVSS scores

4.4WordfenceCVSS:3.1/AV:N/AC:H/PR:H/UI:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript/JScript

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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