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CVE-2023-45207

19
FAUCET Score

CVE-2023-45207 is a stored cross-site scripting (XSS) vulnerability affecting Zimbra Collaboration (ZCS) versions 8.8.15, 9.0, and 10.0. An attacker can embed malicious JavaScript within a PDF document, which executes when a user previews the file in Zimbra webmail using the Chrome browser. This medium-severity vulnerability (CVSS 6.1) requires user interaction (UI:R) but can be exploited remotely (AV:N) with low attack complexity (AC:L), potentially leading to limited confidentiality and integrity impacts (C:L/I:L). There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 10.0.0, < 10.0.5CPE matchmatch criteria
cpe:2.3:a:zimbra:collaboration:*:*:*:*:*:*:*:*
8.8.15CPE matchmatch criteria
cpe:2.3:a:zimbra:collaboration:8.8.15:-:*:*:*:*:*:*
8.8.15CPE matchmatch criteria
cpe:2.3:a:zimbra:collaboration:8.8.15:p1:*:*:*:*:*:*
8.8.15CPE matchmatch criteria
cpe:2.3:a:zimbra:collaboration:8.8.15:p10:*:*:*:*:*:*
8.8.15CPE matchmatch criteria
cpe:2.3:a:zimbra:collaboration:8.8.15: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
0.47%
Probability of exploitation in next 30 days
EPSS Percentile
38.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0047 is in the 40th 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 NotesVendor Advisory
wiki.zimbra.com / wiki/Zimbra_Responsible_Disclosure_Policy
Product
wiki.zimbra.com / wiki/Zimbra_Security_Advisories
Vendor Advisory