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CVE-2023-24031

19
FAUCET Score

CVE-2023-24031 is a medium-severity cross-site scripting (XSS) vulnerability affecting Zimbra Collaboration (ZCS) versions 9.0 and 8.8.15. An unauthenticated attacker can exploit this flaw via the webmail /h/ endpoint to execute arbitrary JavaScript code, potentially leading to information disclosure. While the attack complexity is low and user interaction is required, there is currently no public exploit code, evidence of active exploitation, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
9.0.0CPE matchmatch criteria
cpe:2.3:a:zimbra:collaboration:9.0.0:-:*:*:*:*:*:*
9.0.0CPE matchmatch criteria
cpe:2.3:a:zimbra:collaboration:9.0.0:p0:*:*:*:*:*:*
9.0.0CPE matchmatch criteria
cpe:2.3:a:zimbra:collaboration:9.0.0:p1:*:*:*:*:*:*
9.0.0CPE matchmatch criteria
cpe:2.3:a:zimbra:collaboration:9.0.0:p10:*:*:*:*:*:*
9.0.0CPE matchmatch criteria
cpe:2.3:a:zimbra:collaboration:9.0.0:p11:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.40%
Probability of exploitation in next 30 days
EPSS Percentile
32.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0040 is in the 34th percentile among its peer group of 26,236 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

wiki.zimbra.com / wiki/Security_Center
Release Notes
wiki.zimbra.com / wiki/Zimbra_Security_Advisories
Vendor Advisory