CVE-2021-47749Public exploitNetwork attack vector

Unauthenticated PHP file disclosure via lang traversal

Published Jan 13, 2026 · Updated Jan 13, 2026

Local file inclusion in locale/function.php in WWBN AVideo 7.8 and earlier allows remote attackers to read local PHP files via GET. The lang value is only tag-stripped, stored in the session, and interpolated into an include_once path without blocking traversal sequences. A network-reachable installation is sufficient; the target must be a local .php file, whose output is returned in the HTTP response.

CVSS severity8.7
High
EPSS probability1.85%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Local file inclusion in locale/function.php in WWBN AVideo 7.8 and earlier allows remote attackers to read local PHP files via GET. The lang value is only tag-stripped, stored in the session, and interpolated into an include_once path without blocking traversal sequences. A network-reachable installation is sufficient; the target must be a local .php file, whose output is returned in the HTTP response.

The record

CVE
CVE-2021-47749
Published
Jan 13, 2026
Updated
Jan 13, 2026
Vendor
WWBN
Product
AVideo
Classifications
CWE-22, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 13, 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 <=7.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WWBN · AVideoversion=0 <=7.8

Published CVSS scores

8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
5.5VulnCheckCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
7.5Exploit-DB submissionCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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.

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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-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1190Exploit Public-Facing Application

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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