CVE-2026-65510Network attack vector

Unauthenticated stored script execution in user browsers

Published Jul 23, 2026 · Updated Jul 23, 2026

Stored cross-site scripting in PeproDev Ultimate Invoice 2.2.6 and earlier allows remote attackers to execute scripts in site users' browsers. Patchstack identifies stored XSS but does not disclose the affected request, parameter, function, or unsafe storage and rendering operations. No authentication is required to place the payload, and user interaction is required before the stored script executes in the affected site's browser origin.

CVSS severity7.1
High
EPSS probability0.25%
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 PeproDev Ultimate Invoice 2.2.6 and earlier allows remote attackers to execute scripts in site users' browsers. Patchstack identifies stored XSS but does not disclose the affected request, parameter, function, or unsafe storage and rendering operations. No authentication is required to place the payload, and user interaction is required before the stored script executes in the affected site's browser origin.

The record

CVE
CVE-2026-65510
Published
Jul 23, 2026
Updated
Jul 23, 2026
Vendor
Pepro Development Group
Product
PeproDev Ultimate Invoice
Classifications
CWE-79, CAPEC-592, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 23, 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 <=2.2.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Pepro Development Group · PeproDev Ultimate Invoiceversion=n/a <=2.2.6

Published CVSS scores

7.1PatchstackCVSS: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')
CAPEC-592Stored XSS
T1203Exploitation for Client Execution

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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