CVE-2021-21250
HIGHDescription
OneDev is an all-in-one devops platform. In OneDev before version 4.0.3, there is a critical vulnerability which may lead to arbitrary file read. When BuildSpec is provided in XML format, the spec is processed by XmlBuildSpecMigrator.migrate(buildSpecString); which processes the XML document without preventing the expansion of external entities. These entities can be configured to read arbitrary files from the file system and dump their contents in the final XML document to be migrated. If the files are dumped in properties included in the YAML file, it will be possible for an attacker to read them. If not, it is possible for an attacker to exfiltrate the contents of these files Out Of Band. This issue was addressed in 4.0.3 by ignoring ENTITY instructions in xml file.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Exploit Intelligence
Moderate risk: more likely to be exploited than 57% of all known CVEs.
References
Related Vulnerabilities
Other CWE-538 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2024-51977 | Medium | 5.3 | 78% | - | - |
| CVE-2019-6851 | High | 7.5 | 30% | - | - |
| CVE-2017-9947 | Medium | 5.3 | 7.3% | - | Fix |
| CVE-2018-11798 | Medium | 6.5 | 4.9% | - | Fix |
| CVE-2017-16770 | Medium | 6.5 | 1.8% | - | Fix |
| CVE-2018-10590 | High | 7.5 | 1.7% | - | Fix |
Common questions
How do I fix CVE-2021-21250?
Upgrade onedev to 4.0.3 or later.
Is CVE-2021-21250 being actively exploited?
Not that we know of. CVE-2021-21250 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.93% is the estimated probability that it will be exploited in the next 30 days. That is higher than 57% of all scored CVEs.
How severe is CVE-2021-21250?
CVE-2021-21250 has a CVSS v3 base score of 7.7, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2021-21250 affect?
Published advisories record a fix for onedev (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
Embed a live status badge for CVE-2021-21250
Markdown
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.