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CVE-2017-20188

15
FAUCET Score

CVE-2017-20188 describes a problematic cross-site scripting (XSS) vulnerability in Zimbra zm-ajax versions up to 8.8.1, specifically within the XFormItem.prototype.setError function of the WebRoot/js/ajax/dwt/xforms/XFormItem.js file. This flaw allows for remote code execution through manipulation of the 'message' argument. While the CVSS score is 4.7 (Medium), indicating a low impact on confidentiality and integrity, the attack complexity is rated as high, and exploitation is considered difficult. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage, suggesting a low current threat level.

Impacted Technologies

VendorProductVersion(s)CPE
< 8.8.2CPE matchmatch criteria
cpe:2.3:a:zimbra:zm-ajax:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

2.6LOW

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
1.2
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.39%
Probability of exploitation in next 30 days
EPSS Percentile
32.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0039 is in the 52nd percentile among its peer group of 705 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.2 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / Zimbra/zm-ajax/commit/8d039d6efe80780adc40c6f670c06d21de272105
Patch
github.com / Zimbra/zm-ajax/releases/tag/8.8.2
Release Notes
vuldb.com
Permissions RequiredThird Party Advisory
vuldb.com
Third Party Advisory