VulnerabilityPublished 7 May 2026

CVE-2026-42194: admidio · Server-Side Request Forgery (SSRF)

Affects admidioSource GCVE Database

Not known to be exploited · CVSS 6.8 Medium : upgrade to 5.0.9 when convenient.

Data as of 27 Oct 2026, 02:50 UTC

CVSS 3.1 base score

6.8Medium

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

Patch: Available – fixed in 5.0.9

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

Attack Vector: Network
Attack Complexity: Low
Privileges Required: High
User Interaction: None
Scope: Changed
Confidentiality: High
Integrity: None
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: High: The attacker is authorized with (i.e., requires) privileges that provide significant (e.g., administrative) control over the vulnerable component that could affect component-wide settings and files.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Changed: An exploited vulnerability can affect resources beyond the security scope managed by the security authority of the vulnerable component. In this case, the vulnerable component and the impacted component are different and managed by different security authorities.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: None: There is no loss of integrity within 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 7 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 26 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.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, 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 admidio to 5.0.9.

Affected software

Product	Affected	Fixed in
Admidio admidio	Affected <5.0.9	Fixed in 5.0.9

AI-suggested

Upgrade Admidio to version 5.0.9 or later, where the SSRF vulnerability has been fixed. No additional mitigation steps are required as the vendor has provided an official fix.

Description

CVE-2026-42194 is a Server-Side Request Forgery (SSRF) vulnerability in Admidio, an open-source user management solution. The flaw exists in versions prior to 5.0.9 due to an incomplete fix in fetch_metadata.php, where the resolved IP address is validated but the original hostname-based URL is still passed to curl_init(). This creates a DNS rebinding time-of-check to time-of-use (TOCTOU) window that can redirect requests to internal IP addresses. The issue has been fixed in version 5.0.9.

Impact

Successful exploitation allows an attacker with high privileges to redirect server-side HTTP requests to internal IP addresses, potentially accessing internal network resources or services that are not otherwise exposed. The CVSS score of 6.8 reflects a medium severity impact with high confidentiality impact but no integrity or availability impact.

Summary

Admidio versions before 5.0.9 contain an SSRF vulnerability (CWE-918) in the fetch_metadata.php script. Although the resolved IP address is validated to prevent SSRF, the original hostname-based URL is passed to curl_init(), allowing an attacker to exploit a DNS rebinding TOCTOU window. This enables redirection of requests to internal IP addresses, potentially exposing internal network resources. The vulnerability is patched in Admidio version 5.0.9.

CWE-918Server-Side Request Forgery (SSRF) (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.
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

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 27 Oct 2026, 02:50 UTC

WeaknessesCWE-918

Technical details

References

Community reviews

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