CVE-2017-9233

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

8.73% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 94.7% of scored records. A rank, not a probability.

NVD base score

7.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-10-08.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2017-07-25 20:00Z9 YR AGO

Last updated

2026-10-08 21:03Z20 DAYS AGO

Reserved

2017-05-26

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-611Improper Restriction of XML External Entity ReferenceBase
• CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')Base

Data version

5.2

Document digest

0371e417ca34ea5ab929a9bd96c34fc79d2644750686090b233971b591b49d44

• support.apple.comhttps://support.apple.com/HT208144x_refsource_CONFIRM
• libexpat.github.iohttps://libexpat.github.io/doc/cve-2017-9233/x_refsource_CONFIRM
• github.comhttps://github.com/libexpat/libexpat/blob/master/expat/Changesx_refsource_CONFIRM
• www.securitytracker.com1039427http://www.securitytracker.com/id/1039427vdb-entryx_refsource_SECTRACK
• support.apple.comhttps://support.apple.com/HT208113x_refsource_CONFIRM
• support.apple.comhttps://support.apple.com/HT208112x_refsource_CONFIRM
• support.apple.comhttps://support.apple.com/HT208115x_refsource_CONFIRM
• www.debian.orgDSA-3898http://www.debian.org/security/2017/dsa-3898vendor-advisoryx_refsource_DEBIAN
• www.securityfocus.com99276http://www.securityfocus.com/bid/99276vdb-entryx_refsource_BID
• www.openwall.com[oss-security] 20170618 Expat 2.2.1 security fixeshttp://www.openwall.com/lists/oss-security/2017/06/17/7mailing-listx_refsource_MLIST
• support.f5.comhttps://support.f5.com/csp/article/K03244804x_refsource_CONFIRM
• lists.apache.org[bookkeeper-issues] 20210628 [GitHub] [bookkeeper] padma81 opened a new issue #2746: Security Vulnerabilities in CentOS 7 image, Upgrade image to CentOS 8https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3Emailing-listx_refsource_MLIST
• lists.apache.org[bookkeeper-issues] 20210629 [GitHub] [bookkeeper] padma81 opened a new issue #2746: Security Vulnerabilities in CentOS 7 image, Upgrade image to CentOS 8https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3Emailing-listx_refsource_MLIST