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CVE-2023-3969

17
FAUCET Score

CVE-2023-3969 is a cross-site scripting (XSS) vulnerability found in GZ Scripts Availability Booking Calendar PHP version 1.0. Specifically, the vulnerability resides in the index.php file's HTTP POST Request Handler, where manipulating the 'promo_code' argument allows for remote XSS attacks. Rated as medium severity with a CVSS score of 5.4, this vulnerability requires low privileges and user interaction, potentially leading to limited impact on confidentiality and integrity. While the exploit has been publicly disclosed, there is no evidence of active exploitation, nor is it listed in the KEV catalog, with minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
1.0CPE matchmatch criteria
cpe:2.3:a:gzscripts:availability_booking_calendar_php:1.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

3.5LOW

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.1
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.50%
Probability of exploitation in next 30 days
EPSS Percentile
40.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0050 is in the 61st percentile among its peer group of 15,224 CVEs.

Social Chatter

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

Remediation

Remediation records are not available for this CVE.

References

seclists.org / fulldisclosure/2023/Jul/51
ExploitMailing ListThird Party Advisory
vuldb.com
Permissions RequiredThird Party Advisory
vuldb.com
Third Party Advisory