CVE-2017-17762: XML external entity (XXE) vulnerability in Episerver 7 patch 4 and earlier allows remote attackers to read arb

Q: How do I fix CVE-2017-17762?

episerver: upgrade to newer than 7. Exact commands for each OS are on this page.

Q: Is CVE-2017-17762 being exploited?

CVE-2017-17762 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2017-17762 affect?

CVE-2017-17762 affects episerver. Severity is high (CVSS 7.5). XML external entity (XXE) vulnerability in Episerver 7 patch 4 and earlier allows remote attackers to read arbitrary files via a crafted DTD in an XML request involving util/xmlrpc/Handler.ashx.

Q: How urgent is CVE-2017-17762?

Priority 59/100. High severity; EPSS top 8%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2017-17762 is a high-severity flaw (CVSS 7.5) affecting episerver. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

XML external entity (XXE) vulnerability in Episerver 7 patch 4 and earlier allows remote attackers to read arbitrary files via a crafted DTD in an XML request involving util/xmlrpc/Handler.ashx.

Why this priority

High severity
EPSS top 8%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	4.6% (top 8%)
CISA exploited list	No
Weakness	CWE-611
Published	2018-08-29
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: episerver

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

Am I affected?

Timeline

2018-08-29 19:29 UTCPublished CVE record published
2026-06-17 01:11 UTCUpdated Record last modified

episerver episerver UPGRADE

Affected: <= 7 · 7 · 7 patch_1 · 7 patch_2 · 7 patch_3 · 7 patch_4

Fixed in: newer than 7

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy episerver || rpm -q episerver || episerver --version

2. UPGRADE to newer than 7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade episerver

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade episerver

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Public exploits and detection

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

Nuclei scan template: Episerver 7 - Blind XML External Entity Injection

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-2017-17762?

episerver: upgrade to newer than 7. Exact commands for each OS are on this page.

Is CVE-2017-17762 being exploited?

CVE-2017-17762 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-2017-17762 affect?

CVE-2017-17762 affects episerver. Severity is high (CVSS 7.5). XML external entity (XXE) vulnerability in Episerver 7 patch 4 and earlier allows remote attackers to read arbitrary files via a crafted DTD in an XML request involving util/xmlrpc/Handler.ashx.

How urgent is CVE-2017-17762?

Priority 59/100. High severity; EPSS top 8%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

References

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