CVE-2026-33035Public exploitNetwork attack vector

Unauthenticated reflected XSS via innerHTML rendering

Published Mar 20, 2026 · Updated Mar 20, 2026

Reflected XSS in AVideo before 26.0 allows remote attackers to execute JavaScript in a victim's browser via a crafted URL. The videoNotFound.php handler passes the 404ErrorMsg parameter through json_encode() without HTML-safe flags, and script.js assigns it to innerHTML. Exploitation requires a victim to open the crafted link; script runs in that victim's AVideo origin and can access session data available to JavaScript.

CVSS severity5.3
Medium
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in AVideo before 26.0 allows remote attackers to execute JavaScript in a victim's browser via a crafted URL. The videoNotFound.php handler passes the 404ErrorMsg parameter through json_encode() without HTML-safe flags, and script.js assigns it to innerHTML. Exploitation requires a victim to open the crafted link; script runs in that victim's AVideo origin and can access session data available to JavaScript.

The record

CVE
CVE-2026-33035
Published
Mar 20, 2026
Updated
Mar 20, 2026
Vendor
World Wide Broadcast Network
Product
AVideo
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 26.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

World Wide Broadcast Network · AVideoversion=< 26.0

Published CVSS scores

5.3GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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')
T1189Drive-by Compromise

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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