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CVE-2021-28965

HIGH
7.5
CVSS Score
Published: April 21, 2021 at 06:55 AM UTC
Updated: June 17, 2026 at 03:47 AM UTC
3 products affected across 2 vendorsFedoraRubyRexml

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Severity
HIGH7.5
Exploit prediction
EPSS 5%

Description

The REXML gem before 3.2.5 in Ruby before 2.6.7, 2.7.x before 2.7.3, and 3.x before 3.0.1 does not properly address XML round-trip issues. An incorrect document can be produced after parsing and serializing.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Fedora· Fedora Projectrpm
95%
34
Rexml· Ruby Langrubygems
95%
v < 3.2.5
Affected range stops below 3.2.5, so it looks safe — our inference, not a vendor statement
Ruby· Ruby Langrubygems
95%
v < 2.6.72.7.0 ≤ v < 2.7.33.0.0 ≤ v < 3.0.1
Affected range stops below 2.6.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.7.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.0.1, so it looks safe — our inference, not a vendor statement

References (3)

Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WTVFTLFVCSUE5CXHINJEUCKSHU4SWDMT/
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://security.netapp.com/advisory/ntap-20210528-0003/
x_refsource_MISCVendor Advisory
Source: [email protected]
https://www.ruby-lang.org/en/news/2021/04/05/xml-round-trip-vulnerability-in-rexml-cve-2021-28965/

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-Other

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