CVE-2026-85577Public exploitNetwork attack vectorHinoki check available

Client-side code execution via unescaped error parameter

Published Sep 4, 2026 · Updated Sep 4, 2026

Reflected XSS in WWBN AVideo through commit c91b5975d allows remote attackers to run JavaScript via the login-page error parameter. The view/userLogin.php handler inserts addslashes($_GET['error']) into an inline script, leaving a closing script tag unescaped. Exploitation requires a victim to visit a crafted URL; injected code runs in the login-page origin, while HttpOnly cookies remain unreadable.

CVSS severity5.3
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Reflected XSS in WWBN AVideo through commit c91b5975d allows remote attackers to run JavaScript via the login-page error parameter. The view/userLogin.php handler inserts addslashes($_GET['error']) into an inline script, leaving a closing script tag unescaped. Exploitation requires a victim to visit a crafted URL; injected code runs in the login-page origin, while HttpOnly cookies remain unreadable.

The record

CVE
CVE-2026-85577
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
WWBN
Product
AVideo
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 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 <=c91b5975d

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WWBN · AVideoversion=0 <=c91b5975d

Published CVSS scores

5.4GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
5.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA: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.

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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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001Malicious Link

Public exploit references

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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