VulnerabilityPublished 23 Mar 2026

CVE-2026-33690: WWBN AVideo · Use of Less Trusted Source

Affects WWBN AVideoSource CVE Database V5

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Not known to be exploited · CVSS 5.3 Medium.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score

5.3Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: Low
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact on the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 23 Mar 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
WWBNAVideo	Affected <=26.0	Fixed in–
GitHubwwbn/AVideo`pkg:github/wwbn/AVideo`Other threats	Affected <=26.0	Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

To mitigate this vulnerability, organizations should immediately apply the patch provided by WWBN that corrects the getRealIpAddr() function to avoid trusting user-controlled HTTP headers. In addition to patching, administrators should review their use of IP-based access controls and consider implementing more robust authentication and authorization mechanisms that do not solely rely on IP addresses. Where proxies or load balancers are used, ensure that trusted headers are validated and sanitized properly, and configure the application to only trust headers from known, secure sources. Implement logging enhancements that record multiple indicators of client identity beyond IP addresses, such as authentication tokens or session identifiers, to improve audit reliability. Network-level controls like firewall rules and intrusion detection systems should be employed to complement application-layer protections. Regular security assessments and code reviews focusing on input validation and trust boundaries can prevent similar issues. Finally, monitoring for anomalous access patterns that may indicate IP spoofing attempts is recommended.

Description

CVE-2026-33690 is a medium severity vulnerability in WWBN AVideo versions up to 26.0 where the getRealIpAddr() function trusts user-controlled HTTP headers to determine client IP addresses. This allows attackers to spoof their IP by sending forged headers, potentially bypassing IP-based access controls and evading audit logs. The vulnerability stems from CWE-348: Use of Less Trusted Source. Exploitation requires no privileges or user interaction and can impact integrity by misleading security controls. A patch has been committed to address this issue. No known exploits are currently reported in the wild. Organizations using affected versions should apply the patch promptly and implement additional validation of client IP sources to mitigate risk.

Impact

The primary impact of this vulnerability is the potential for attackers to bypass IP-based access controls, which may be used to restrict access to administrative interfaces, sensitive content, or API endpoints. By spoofing IP addresses, attackers can evade IP-based blocking or rate limiting, increasing the risk of unauthorized access or abuse. Additionally, audit logs that rely on IP addresses for tracking user activity can be rendered unreliable, complicating incident response and forensic investigations. While the vulnerability does not directly compromise data confidentiality or system availability, it undermines security controls that depend on accurate client identification, potentially enabling further attacks or unauthorized actions. Organizations relying heavily on IP-based restrictions or logging within AVideo installations are at increased risk. The lack of required privileges or user interaction lowers the barrier for exploitation, making it accessible to remote attackers. However, the impact is somewhat limited to environments where IP-based controls are critical and actively enforced.

CWE-348Use of Less Trusted Source (opens in a new tab)
Base weakness
The product has two different sources of the same data or information, but it uses the source that has less support for verification, is less trusted, or is less resistant to attack.
OWASP Cheat Sheets
XML Security (opens in a new tab)
REST Security (opens in a new tab)
JSON Web Token for Java (opens in a new tab)
REST Assessment (opens in a new tab)
Cross-Site Request Forgery Prevention (opens in a new tab)
OWASP ASVS 4.0.3
V13.3.2 (opens in a new tab)
V3.5.3 (opens in a new tab)
V13.2.6 (opens in a new tab)
Attack patterns
Cache Poisoning (opens in a new tab)
DNS Cache Poisoning (opens in a new tab)
User-Controlled Filename (opens in a new tab)
Manipulating Web Input to File System Calls (opens in a new tab)
AJAX Footprinting (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 30 Mar 2026, 20:29 UTC

WeaknessesCWE-348

Technical details

References

Community reviews

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