CVE-2021-29505 (GCVE-0-2021-29505)
Vulnerability from cvelistv5 – Published: 2021-05-28 21:00 – Updated: 2025-05-29 23:30
VLAI
EPSS
VEX
Title
XStream is vulnerable to a Remote Command Execution attack
Summary
XStream is software for serializing Java objects to XML and back again. A vulnerability in XStream versions prior to 1.4.17 may allow a remote attacker has sufficient rights to execute commands of the host only by manipulating the processed input stream. No user who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types is affected. The vulnerability is patched in version 1.4.17.
Severity
7.5 (High)
CWE
Assigner
References
20 references
Impacted products
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"value": "XStream es un software para serializar objetos Java a XML y viceversa. Una vulnerabilidad en las versiones de XStream anteriores a la versi\u00f3n 1.4.17 puede permitir a un atacante remoto que tenga derechos suficientes ejecutar comandos del host s\u00f3lo manipulando el flujo de entrada procesado. Ning\u00fan usuario que haya seguido la recomendaci\u00f3n de configurar el marco de seguridad de XStream con una lista blanca limitada a los tipos m\u00ednimos necesarios est\u00e1 afectado. La vulnerabilidad est\u00e1 parcheada en la versi\u00f3n 1.4.17"
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"source": "security-advisories@github.com",
"type": "Secondary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 5.9,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2021-05-28T21:15:08.713",
"references": [
{
"source": "security-advisories@github.com",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://github.com/x-stream/xstream/commit/24fac82191292c6ae25f94508d28b9823f83624f"
},
{
"source": "security-advisories@github.com",
"url": "https://github.com/x-stream/xstream/commit/f0c4a8d861b68ffc3119cfbbbd632deee624e227"
},
{
"source": "security-advisories@github.com",
"tags": [
"Third Party Advisory"
],
"url": "https://github.com/x-stream/xstream/security/advisories/GHSA-7chv-rrw6-w6fc"
},
{
"source": "security-advisories@github.com",
"url": "https://lists.apache.org/thread.html/r8ee51debf7fd184b6a6b020dc31df25118b0aa612885f12fbe77f04f@%3Cdev.jmeter.apache.org%3E"
},
{
"source": "security-advisories@github.com",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "https://lists.debian.org/debian-lts-announce/2021/07/msg00004.html"
},
{
"source": "security-advisories@github.com",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP"
},
{
"source": "security-advisories@github.com",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7"
},
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"source": "security-advisories@github.com",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB"
},
{
"source": "security-advisories@github.com",
"url": "https://security.netapp.com/advisory/ntap-20210708-0007"
},
{
"source": "security-advisories@github.com",
"tags": [
"Third Party Advisory"
],
"url": "https://www.debian.org/security/2021/dsa-5004"
},
{
"source": "security-advisories@github.com",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
},
{
"source": "security-advisories@github.com",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://www.oracle.com/security-alerts/cpujan2022.html"
},
{
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"tags": [
"Third Party Advisory"
],
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},
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"tags": [
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],
"url": "https://www.oracle.com/security-alerts/cpuoct2021.html"
},
{
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},
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"Third Party Advisory"
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},
{
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"url": "https://github.com/x-stream/xstream/security/advisories/GHSA-7chv-rrw6-w6fc"
},
{
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"Mailing List"
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"url": "https://lists.apache.org/thread.html/r8ee51debf7fd184b6a6b020dc31df25118b0aa612885f12fbe77f04f%40%3Cdev.jmeter.apache.org%3E"
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],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP/"
},
{
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},
{
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],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB/"
},
{
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],
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},
{
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"tags": [
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],
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},
{
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"tags": [
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],
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},
{
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"url": "https://www.oracle.com/security-alerts/cpujan2022.html"
},
{
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},
{
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"tags": [
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"Third Party Advisory"
],
"url": "https://www.oracle.com/security-alerts/cpuoct2021.html"
}
],
"sourceIdentifier": "security-advisories@github.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-94"
},
{
"lang": "en",
"value": "CWE-502"
}
],
"source": "security-advisories@github.com",
"type": "Secondary"
},
{
"description": [
{
"lang": "en",
"value": "CWE-502"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Important",
"current_release_date": "2026-05-14T18:31:15+00:00",
"cve": "CVE-2021-29505",
"id": "CVE-2021-29505",
"initial_release_date": "2021-05-14T00:00:00+00:00",
"product_status:fixed": "18",
"product_status:known_affected": "10",
"product_status:known_not_affected": "4",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "XStream: remote command execution attack by manipulating the processed input stream",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-29505.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "important",
"current_release_date": "2026-08-31T02:05:25Z",
"cve": "CVE-2021-29505",
"id": "CVE-2021-29505",
"initial_release_date": "2023-02-15T03:43:30Z",
"product_status:known_affected": "394",
"product_status:recommended": "67",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2021-29505",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-29505.json",
"version": "36"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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