CVE-2023-36661

Xmltooling vulnerability

CVSS

7.5

EPSS

3.1%

EPSS pct

86th

Exploited

No known

Shibboleth XMLTooling before 3.2.4, as used in OpenSAML and Shibboleth Service Provider, allows SSRF via a crafted KeyInfo element. (This is fixed in, for example, Shibboleth Service Provider 3.4.1.3 on Windows.)

Affected vendor

Shibboleth

Affected product

Xmltooling

CVSS vector

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

Weakness type (CWE)

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

Published

2023-06-25

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to availability.

Its EPSS score of 3.1% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 86% of all scored CVEs.

Check your external exposure to CVE-2023-36661

Confirm whether Shibboleth Xmltooling is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2023-36661.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2023-36661

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