VulnerabilityPublished 20 Mar 2026

CVE-2026-33024: WWBN AVideo-Encoder · Server-Side Request Forgery (SSRF)

Affects WWBN AVideo-EncoderSource CVE Database V5

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Not known to be exploited · CVSS 9.3 Critical : upgrade to 8.0 as a priority.

Data as of 31 Oct 2026, 08:20 UTC

CVSS 4.0 base score

9.3Critical

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

Contested

Critical score, yet low EPSS after six months

EPSS: 0.4% chance of exploitation in 30 days – higher than 38% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 8.0

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: None
User Interaction: None
Vulnerable system confidentiality: High
Vulnerable system integrity: High
Vulnerable system availability: None
Subsequent system confidentiality: None
Subsequent system integrity: None
Subsequent system availability: None

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

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, 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: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without interaction from any human user, other than the attacker.
Vulnerable system confidentiality: High: There is a total loss of confidentiality, resulting in all information within the Vulnerable System being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact. For example, an attacker steals the administrator's password, or private encryption keys of a web server.
Vulnerable system integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the vulnerable system. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the vulnerable system.
Vulnerable system availability: None: There is no impact to availability within the Vulnerable System.
Subsequent system confidentiality: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 20 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

Upgrade AVideo-Encoder and wwbn/AVideo-Encoder to 8.0.

Affected software

Product	Affected	Fixed in
WWBNAVideo-Encoder	Affected <8.0	Fixed in 8.0
GitHubwwbn/AVideo-Encoder`pkg:github/wwbn/AVideo-Encoder`Other threats	Affected <8.0	Fixed in 8.0

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 upgrade AVideo-Encoder to version 8.0 or later, where the issue has been fixed. If upgrading is not immediately possible, implement strict input validation on the base64Url parameter to ensure URLs do not point to internal IP ranges, localhost, or cloud metadata IP addresses. Employ allowlisting of trusted external domains and reject all others. Restrict the server's network egress access to prevent connections to sensitive internal or cloud metadata IP addresses from the application server. Monitor application logs for unusual requests to the vulnerable endpoints and signs of SSRF exploitation attempts. Additionally, consider isolating the video encoding service in a network segment with limited access to internal resources. Implement web application firewalls (WAFs) with rules to detect and block SSRF patterns targeting internal IPs. Finally, conduct regular security assessments and penetration testing to detect similar SSRF or input validation issues.

Description

CVE-2026-33024 is a critical Server-Side Request Forgery (SSRF) vulnerability in WWBN's AVideo-Encoder versions prior to 8.0. The flaw exists in the public thumbnail endpoints getImage.php and getImageMP4.php, which accept a base64Url parameter decoded and passed to ffmpeg without proper authentication or sufficient URL validation. Attackers can exploit this to make the server send requests to internal network resources such as cloud metadata services or localhost addresses. Although the response is blind, attackers can infer information through timing and error logs. This vulnerability has a CVSS 4.0 score of 9.3, indicating high severity and ease of exploitation without authentication or user interaction.

Impact

The SSRF vulnerability in AVideo-Encoder can have severe consequences for organizations using affected versions. Attackers can leverage this flaw to perform internal network reconnaissance, accessing sensitive internal services that are otherwise inaccessible externally. This includes cloud instance metadata services, which often contain credentials and configuration data that can be used to escalate privileges or pivot within the network. Access to internal IP ranges can expose databases, admin interfaces, or other critical infrastructure components. Although the SSRF is blind, attackers can still extract valuable information through timing attacks and error messages, potentially leading to further exploitation such as remote code execution or data exfiltration. The lack of authentication and user interaction requirements increases the risk of automated mass scanning and exploitation attempts. Organizations relying on AVideo-Encoder for video processing and sharing may face data breaches, service disruptions, and compromise of their internal network security. Given the critical CVSS score, the vulnerability poses a high risk to confidentiality and integrity, with potential indirect impacts on availability if attackers leverage discovered internal services for further attacks.

CWE-918Server-Side Request Forgery (opens in a new tab)
Base weaknessCWE Top 25 (2025): #22OWASP Top 10 A01:2025: Broken Access Control (opens in a new tab)
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.
Implementation · Operation
If there is a known list of applications, IP, hostname, and/or domains to which the product is allowed to communicate, then use allowlists to ensure that outgoing requests are restricted to these known entities. The allowlists could be in the application code or possibly enforced by firewalls or network segmentation.
Implementation · Operation
If the product is expected to be able to connect to arbitrary IP addresses or domains, consider using a denylist that includes private network addresses, internal domain names, etc. The denylist could be in the application code or possibly enforced by firewalls or network segmentation.
Implementation · Input Validation
Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
OWASP Cheat Sheets
Server Side Request Forgery Prevention (opens in a new tab)
Unvalidated Redirects and Forwards (opens in a new tab)
Cross Site Scripting Prevention (opens in a new tab)
DOM based XSS Prevention (opens in a new tab)
Authorization (opens in a new tab)
OWASP ASVS 4.0.3
V12.6.1 (opens in a new tab)
V5.2.6 (opens in a new tab)
Attack patterns
Server Side Request Forgery (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 27 Mar 2026, 19:40 UTC

WeaknessesCWE-918

Technical details

References

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