CVE-2015-0923: The ContentBlockEx method in Workarea/ServerControlWS.asmx in Ektron Content Management System (CMS) 8.5 and 8

This week

MEDIUM 5.0DOWNGRADE

CVE-2015-0923 is a medium-severity flaw (CVSS 5.0) affecting ektron content management system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The ContentBlockEx method in Workarea/ServerControlWS.asmx in Ektron Content Management System (CMS) 8.5 and 8.7 before 8.7sp2 and 9.0 before sp1 allows remote attackers to read arbitrary files via an external entity declaration in conjunction with an entity reference within an XML document named in the xslt parameter, related to an XML External Entity (XXE) issue.

Why this priority

EPSS top 2%: very likely to be exploited
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	22.0% (top 2%)
CISA exploited list	No
Published	2015-02-14
Last modified	2026-06-17

Publisher (CNA): CERT/CC · Vendor: ektron

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2015-02-14 03:01 UTCPublished CVE record published
2026-06-17 00:21 UTCUpdated Record last modified

ektron ektron content management system DOWNGRADE

Affected: 8.5.0 · 8.7.0 · 8.7.0 sp1 · 8.9.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.5.0

1. Check installed version

apt-cache policy ektron-content-management-system || rpm -q ektron-content-management-system || ektron-content-management-system --version

2. No fixed release: DOWNGRADE to a release before 8.5.0 (Debian / Ubuntu)

apt-cache madison ektron-content-management-system sudo apt install ektron-content-management-system=<VERSION_BEFORE_8.5.0> sudo apt-mark hold ektron-content-management-system

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list ektron-content-management-system sudo dnf downgrade ektron-content-management-system-<VERSION_BEFORE_8.5.0> sudo dnf versionlock add ektron-content-management-system

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Metasploit: Ektron 8.5, 8.7, 9.0 XSLT Transform Remote Code Execution

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2015-0923?

ektron content management system: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2015-0923 being exploited?

CVE-2015-0923 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2015-0923 affect?

CVE-2015-0923 affects ektron content management system. Severity is medium (CVSS 5.0). The ContentBlockEx method in Workarea/ServerControlWS.asmx in Ektron Content Management System (CMS) 8.5 and 8.7 before 8.7sp2 and 9.0 before sp1 allows remote attackers to read arbitrary files via an external entity declaration in conjunct

How urgent is CVE-2015-0923?

Priority 47/100. EPSS top 2%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2016-6201 MEDIUM 6.1 UPGRADE Cross-site scripting (XSS) vulnerability in Ektron Content Management System (CMS) before 9.1.0.184 SP3 (9.1.0
CVE-2016-6133 MEDIUM 6.1 UPGRADE Cross-site scripting (XSS) vulnerability in Ektron Content Management System before 9.1.0.184SP3(9.1.0.184.3.1
CVE-2015-4427 LOW 3.5 UPGRADE Multiple cross-site scripting (XSS) vulnerabilities in Test/WorkArea/workarea.aspx in Ektron Content Managemen
CVE-2015-3624 MEDIUM 5.8 UPGRADE Cross-site request forgery (CSRF) vulnerability in Test/WorkArea/DmsMenu/menuActions/MenuActions.aspx in Ektro
CVE-2015-0931 MEDIUM 6.8 DOWNGRADE Ektron Content Management System (CMS) 8.5 and 8.7 before 8.7sp2 and 9.0 before sp1, when the Saxon XSLT parse

References

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