---
title: "Security digest: December 24, 2023"
url: https://erroneo.us/security/2023-12-24/
description: "December 24, 2023 vulnerability digest: 1 brief (Spreadsheet::ParseExcel CVE-2023-7101…). What to patch and who can relax."
type: security-digest-day
section: "Security Digest"
date_published: 2023-12-24
date_modified: 2026-10-23
publisher: erroneo.us
author: erroneo.us Security Desk
license: All rights reserved. Quote with attribution and a link.
---

# Security digest: December 24, 2023

1 editorial brief.

## Take stock

- Check exposure: Spreadsheet::ParseExcel CVE-2023-7101: Excel-File Perl RCE . Teams running Perl services, mail filters or appliances that parse uploaded or emailed XLS/XLSX files with Spreadsheet::ParseExcel 0.65 or earlier, directly or through Spreadsheet::ParseXLSX.
- None of it touches your stack? Then there is nothing to do today. That is a result, not a failure to read carefully.

## Editorial briefs

- **Check exposure** [Spreadsheet::ParseExcel CVE-2023-7101: Excel-File Perl RCE](https://erroneo.us/security/briefs/spreadsheet-parseexcel-cve-2023-7101-barracuda-esg-rce/index.md): Barracuda ESG fixed itself automatically in December 2023; the lingering risk is Perl code that still parses untrusted spreadsheets with Spreadsheet::ParseExcel 0.65 or older, often in vendored or appliance copies.

## Known exploited (CISA KEV)

None.

## Critical advisories

None.

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Source page: https://erroneo.us/security/2023-12-24/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt