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CVE-2018-20664

34
FAUCET Score

CVE-2018-20664 describes an XML External Entity (XXE) vulnerability in Zoho ManageEngine ADSelfService Plus 5.x prior to build 5701, specifically exploitable through an uploaded product license file. This critical vulnerability, with a CVSS score of 9.8, allows an unauthenticated attacker to achieve full compromise of confidentiality, integrity, and availability with low attack complexity. While the vulnerability is severe, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
5.7CPE matchmatch criteria
cpe:2.3:a:zohocorp:manageengine_adselfservice_plus:5.7:4500:*:*:*:*:*:*
5.7CPE matchmatch criteria
cpe:2.3:a:zohocorp:manageengine_adselfservice_plus:5.7:5032:*:*:*:*:*:*
5.7CPE matchmatch criteria
cpe:2.3:a:zohocorp:manageengine_adselfservice_plus:5.7:5040:*:*:*:*:*:*
5.7CPE matchmatch criteria
cpe:2.3:a:zohocorp:manageengine_adselfservice_plus:5.7:5041:*:*:*:*:*:*
5.7CPE matchmatch criteria
cpe:2.3:a:zohocorp:manageengine_adselfservice_plus:5.7:5100:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
8.05%
Probability of exploitation in next 30 days
EPSS Percentile
94.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0805 is in the 89th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

excellium-services.com / cert-xlm-advisory/cve-2018-20664
Third Party Advisory
manageengine.com / products/self-service-password/release-notes.html
Release NotesVendor Advisory