CVE-2021-28965
HIGHCVSS 7.5/10EPSS 5.06%
Last modified
CVE-2021-28965 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 5.06% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Ruby-Lang | Rexml | < 3.2.5 |
| Ruby-Lang | Ruby | < 2.6.7 |
| Ruby-Lang | Ruby | >= 2.7.0, < 2.7.3 |
| Ruby-Lang | Ruby | >= 3.0.0, < 3.0.1 |
| Fedoraproject | Fedora | 34 |
References
- https://security.netapp.com/advisory/ntap-20210528-0003/Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210528-0003/Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-28965?
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.
How severe is CVE-2021-28965?
CVE-2021-28965 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 5.06% probability of exploitation in the next 30 days.
How do I fix CVE-2021-28965?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
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Are you affected by CVE-2021-28965?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST