VDB-173276 · CVE-2021-28965 · Nessus 236604

REXML Gem up to 3.2.4 on Ruby

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.4	$0-$5k	0.00

Summaryinfo

A vulnerability described as problematic has been identified in REXML Gem up to 3.2.4 on Ruby. This issue affects some unknown processing of the component XML Handler. Such manipulation leads to an unknown weakness. This vulnerability is documented as CVE-2021-28965. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in REXML Gem up to 3.2.4 on Ruby (Ruby Gem). It has been rated as problematic. Affected by this issue is an unknown code block of the component XML Handler. Impacted is integrity, and availability.

The weakness was released 04/22/2021. The advisory is shared for download at ruby-lang.org. This vulnerability is handled as CVE-2021-28965. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 236604 (Alibaba Cloud Linux 3 : 0044: ruby:2.7 (ALINUX3-SA-2021:0044)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.2.5 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (236604) and CERT Bund (WID-SEC-2023-2462). Once again VulDB remains the best source for vulnerability data.

Affected

Debian Linux
Amazon Linux 2
Red Hat Enterprise Linux
Ubuntu Linux
SUSE Linux
Oracle Linux
Open Source Ruby
SUSE openSUSE

Productinfo

Type

Ruby Gem

Name

REXML Gem

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.6
VulDB Meta Temp Score: 4.4

VulDB Base Score: 4.6
VulDB Temp Score: 4.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Unknown
CWE: Unknown
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 236604
Nessus Name: Alibaba Cloud Linux 3 : 0044: ruby:2.7 (ALINUX3-SA-2021:0044)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: REXML Gem 3.2.5

Timelineinfo

03/22/2021 🔍
04/22/2021 +30 days 🔍
04/22/2021 +0 days 🔍
05/09/2026 +1843 days 🔍

Sourcesinfo

Advisory: ruby-lang.org
Status: Confirmed

CVE: CVE-2021-28965 (🔍)
GCVE (CVE): GCVE-0-2021-28965
GCVE (VulDB): GCVE-100-173276
CERT Bund: WID-SEC-2023-2462 - Ruby: Mehrere Schwachstellen

Entryinfo

Created: 04/22/2021 08:38
Updated: 05/09/2026 18:30
Changes: 04/22/2021 08:38 (37), 04/23/2021 19:17 (5), 05/20/2025 18:17 (16), 05/09/2026 18:30 (7)
Complete: 🔍
Cache ID: 216::103