CVE-2026-15889Network attack vector

Stored script execution via unescaped post content

Published Sep 10, 2026 · Updated Sep 10, 2026

Stored XSS in Aruba HiSpeed Cache 3.0.14 and earlier allows remote authenticated users to inject scripts through WordPress post content. The plugin preserves attacker-controlled markup in post content and renders it without adequate input sanitization or contextual output escaping. Contributor access is sufficient; the payload executes whenever a user opens the injected page and can act in that viewer's browser context.

CVSS severity6.4
Medium
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 XSS in Aruba HiSpeed Cache 3.0.14 and earlier allows remote authenticated users to inject scripts through WordPress post content. The plugin preserves attacker-controlled markup in post content and renders it without adequate input sanitization or contextual output escaping. Contributor access is sufficient; the payload executes whenever a user opens the injected page and can act in that viewer's browser context.

The record

CVE
CVE-2026-15889
Published
Sep 10, 2026
Updated
Sep 10, 2026
Vendor
Aruba PEC S.p.A.
Product
Aruba HiSpeed Cache
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 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 <=3.0.14

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Aruba PEC S.p.A. · Aruba HiSpeed Cacheversion=0 <=3.0.14

Published CVSS scores

6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

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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