CVE-2022-35741 | Apache CloudStack SAML Single Sign-On XXE

Apache CloudStack version 4.5.0 and later has a SAML 2.0 authentication Service Provider plugin which is found to be vulnerable to XML external entity (XXE) injection. This plugin is not enabled by default and the attacker would require that this plugin be enabled to exploit the vulnerability. When the SAML 2.0 plugin is enabled in affected versions of Apache CloudStack could potentially allow the exploitation of XXE vulnerabilities. The SAML 2.0 messages constructed during the authentication flow in Apache CloudStack are XML-based and the XML data is parsed by various standard libraries that are now understood to be vulnerable to XXE injection attacks such as arbitrary file reading, possible denial of service, server-side request forgery (SSRF) on the CloudStack management server.

Published: 2022-07-18 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-35741 is rated High Risk (78.1/100): CVSS Critical severity, with high exploitation likelihood (EPSS 34.43%, 97th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +15.01% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2022-35741

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-01-26 19.42% 34.43% +15.01%
2 2025-11-21 37.24% 19.42% -17.82%
3 2025-11-18 — 37.24% —

Full EPSS history (20 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-35741

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]

Weakness enumeration for CVE-2022-35741

Affected software / configurations for CVE-2022-35741

Vendor Product Version Raw CPE
apache cloudstack >= 4.5.0, < 4.16.1.1 cpe:2.3:a:apache:cloudstack:*:*:*:*:*:*:*:*
apache cloudstack 4.17.0.0 cpe:2.3:a:apache:cloudstack:4.17.0.0:*:*:*:*:*:*:*

References for CVE-2022-35741

URL Tags
http://www.openwall.com/lists/oss-security/2022/07/18/2 Mailing List Mitigation Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/07/20/1 Mailing List Mitigation Third Party Advisory
https://lists.apache.org/thread/hwhxvtwp1d5dsm156bsf1cnyvtmrfv3f Issue Tracking Mailing List Mitigation Patch Vendor Advisory
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