Detections
Analytics

SCA: security update for symfony/serializer, symfony/symfony (GHSA-2xhg-w2g5-w95x)

medium Tenable Cloud Security Plugin ID 409171

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Symfony/Serializer handles serializing and deserializing data structures for Symfony, a PHP framework for
 web and console applications and a set of reusable PHP components. Symfony versions 4.1.0 before 4.4.35
 and versions 5.0.0 before 5.3.12 are vulnerable to CSV injection, also known as formula injection. In
 Symfony 4.1, maintainers added the opt-in `csv_escape_formulas` option in the `CsvEncoder`, to prefix all
 cells starting with `=`, `+`, `-` or `@` with a tab `\t`. Since then, OWASP added 2 chars in that list:
 Tab (0x09) and Carriage return (0x0D). This makes the previous prefix char (Tab `\t`) part of the
 vulnerable characters, and OWASP suggests using the single quote `'` for prefixing the value. Starting
 with versions 4.4.34 and 5.3.12, Symfony now follows the OWASP recommendations and uses the single quote
 `'` to prefix formulas and add the prefix to cells starting by `\t`, `\r` as well as `=`, `+`, `-` and
 `@`. (CVE-2021-41270)

See Also

https://github.com/advisories/GHSA-2xhg-w2g5-w95x

Plugin Details

Severity: Medium

ID: 409171

Version: Revision 1.5

Type: Local

Family: SCA Checks

Published: 1/23/2025

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.18

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 4

Temporal Score: 3

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:N/A:N

CVSS Score Source: CVE-2021-41270

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 11/24/2021

Vulnerability Publication Date: 11/24/2021

Reference Information

CVE: CVE-2021-41270