CVE-2021-4315 (GCVE-0-2021-4315)
Vulnerability from cvelistv5 – Published: 2023-01-28 22:58 – Updated: 2024-08-03 17:23- CWE-1336 - Improper Neutralization of Special Elements Used in a Template Engine
| URL | Tags |
|---|---|
| https://vuldb.com/?id.219676 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.219676 | signaturepermissions-required |
| https://github.com/NYUCCL/psiTurk/pull/517 | exploitissue-tracking |
| https://github.com/NYUCCL/psiTurk/commit/47787e15… | patch |
| https://github.com/NYUCCL/psiTurk/releases/tag/v3.2.1 | patch |
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-03T17:23:10.546Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"vdb-entry",
"technical-description",
"x_transferred"
],
"url": "https://vuldb.com/?id.219676"
},
{
"tags": [
"signature",
"permissions-required",
"x_transferred"
],
"url": "https://vuldb.com/?ctiid.219676"
},
{
"tags": [
"exploit",
"issue-tracking",
"x_transferred"
],
"url": "https://github.com/NYUCCL/psiTurk/pull/517"
},
{
"tags": [
"patch",
"x_transferred"
],
"url": "https://github.com/NYUCCL/psiTurk/commit/47787e15cecd66f2aa87687bf852ae0194a4335f"
},
{
"tags": [
"patch",
"x_transferred"
],
"url": "https://github.com/NYUCCL/psiTurk/releases/tag/v3.2.1"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "psiTurk",
"vendor": "NYUCCL",
"versions": [
{
"status": "affected",
"version": "3.0"
},
{
"status": "affected",
"version": "3.1"
},
{
"status": "affected",
"version": "3.2"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "tool",
"value": "VulDB GitHub Commit Analyzer"
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability has been found in NYUCCL psiTurk up to 3.2.0 and classified as critical. This vulnerability affects unknown code of the file psiturk/experiment.py. The manipulation of the argument mode leads to improper neutralization of special elements used in a template engine. The exploit has been disclosed to the public and may be used. Upgrading to version 3.2.1 is able to address this issue. The name of the patch is 47787e15cecd66f2aa87687bf852ae0194a4335f. It is recommended to upgrade the affected component. The identifier of this vulnerability is VDB-219676."
},
{
"lang": "de",
"value": "In NYUCCL psiTurk bis 3.2.0 wurde eine kritische Schwachstelle gefunden. Das betrifft eine unbekannte Funktionalit\u00e4t der Datei psiturk/experiment.py. Mittels Manipulieren des Arguments mode mit unbekannten Daten kann eine improper neutralization of special elements used in a template engine-Schwachstelle ausgenutzt werden. Der Exploit steht zur \u00f6ffentlichen Verf\u00fcgung. Ein Aktualisieren auf die Version 3.2.1 vermag dieses Problem zu l\u00f6sen. Der Patch wird als 47787e15cecd66f2aa87687bf852ae0194a4335f bezeichnet. Als bestm\u00f6gliche Massnahme wird das Einspielen eines Upgrades empfohlen."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
"version": "3.1"
}
},
{
"cvssV3_0": {
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
"version": "3.0"
}
},
{
"cvssV2_0": {
"baseScore": 5.2,
"vectorString": "AV:A/AC:L/Au:S/C:P/I:P/A:P",
"version": "2.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-1336",
"description": "CWE-1336 Improper Neutralization of Special Elements Used in a Template Engine",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2023-10-20T13:50:31.040Z",
"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"shortName": "VulDB"
},
"references": [
{
"tags": [
"vdb-entry",
"technical-description"
],
"url": "https://vuldb.com/?id.219676"
},
{
"tags": [
"signature",
"permissions-required"
],
"url": "https://vuldb.com/?ctiid.219676"
},
{
"tags": [
"exploit",
"issue-tracking"
],
"url": "https://github.com/NYUCCL/psiTurk/pull/517"
},
{
"tags": [
"patch"
],
"url": "https://github.com/NYUCCL/psiTurk/commit/47787e15cecd66f2aa87687bf852ae0194a4335f"
},
{
"tags": [
"patch"
],
"url": "https://github.com/NYUCCL/psiTurk/releases/tag/v3.2.1"
}
],
"timeline": [
{
"lang": "en",
"time": "2023-01-27T00:00:00.000Z",
"value": "Advisory disclosed"
},
{
"lang": "en",
"time": "2023-01-27T00:00:00.000Z",
"value": "CVE reserved"
},
{
"lang": "en",
"time": "2023-01-27T01:00:00.000Z",
"value": "VulDB entry created"
},
{
"lang": "en",
"time": "2023-02-23T18:25:25.000Z",
"value": "VulDB entry last update"
}
],
"title": "NYUCCL psiTurk experiment.py special elements used in a template engine"
}
},
"cveMetadata": {
"assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"assignerShortName": "VulDB",
"cveId": "CVE-2021-4315",
"datePublished": "2023-01-28T22:58:03.669Z",
"dateReserved": "2023-01-27T22:39:05.635Z",
"dateUpdated": "2024-08-03T17:23:10.546Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2021-4315",
"date": "2026-11-12",
"epss": "0.00915",
"percentile": "0.6064"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"product": "psiTurk",
"vendor": "NYUCCL",
"versions": [
{
"status": "affected",
"version": "3.0"
},
{
"status": "affected",
"version": "3.1"
},
{
"status": "affected",
"version": "3.2"
}
]
}
],
"source": "cna@vuldb.com"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:psiturk:psiturk:*:*:*:*:*:*:*:*",
"matchCriteriaId": "1E68E62D-79F6-4695-8E5A-19B48CA72304",
"versionEndExcluding": "3.2.1",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability has been found in NYUCCL psiTurk up to 3.2.0 and classified as critical. This vulnerability affects unknown code of the file psiturk/experiment.py. The manipulation of the argument mode leads to improper neutralization of special elements used in a template engine. The exploit has been disclosed to the public and may be used. Upgrading to version 3.2.1 is able to address this issue. The name of the patch is 47787e15cecd66f2aa87687bf852ae0194a4335f. It is recommended to upgrade the affected component. The identifier of this vulnerability is VDB-219676."
},
{
"lang": "es",
"value": "Se ha encontrado una vulnerabilidad en NYUCCL psiTurk hasta 3.2.0 y ha sido clasificada como cr\u00edtica. Esta vulnerabilidad afecta a un c\u00f3digo desconocido del archivo psiturk/experiment.py. La manipulaci\u00f3n del modo argumento conduce a una neutralizaci\u00f3n inadecuada de elementos especiales utilizados en un motor de plantillas. El exploit ha sido divulgado al p\u00fablico y puede utilizarse. La actualizaci\u00f3n a la versi\u00f3n 3.2.1 puede solucionar este problema. El nombre del parche es 47787e15cecd66f2aa87687bf852ae0194a4335f. Se recomienda actualizar el componente afectado. El identificador de esta vulnerabilidad es VDB-219676."
}
],
"id": "CVE-2021-4315",
"lastModified": "2026-06-17T04:19:29.460",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "ADJACENT_NETWORK",
"authentication": "SINGLE",
"availabilityImpact": "PARTIAL",
"baseScore": 5.2,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:A/AC:L/Au:S/C:P/I:P/A:P",
"version": "2.0"
},
"exploitabilityScore": 5.1,
"impactScore": 6.4,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "cna@vuldb.com",
"type": "Secondary",
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
"version": "3.1"
},
"exploitabilityScore": 2.1,
"impactScore": 3.4,
"source": "cna@vuldb.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": "2023-01-28T23:15:08.687",
"references": [
{
"source": "cna@vuldb.com",
"tags": [
"Patch"
],
"url": "https://github.com/NYUCCL/psiTurk/commit/47787e15cecd66f2aa87687bf852ae0194a4335f"
},
{
"source": "cna@vuldb.com",
"tags": [
"Issue Tracking"
],
"url": "https://github.com/NYUCCL/psiTurk/pull/517"
},
{
"source": "cna@vuldb.com",
"tags": [
"Release Notes"
],
"url": "https://github.com/NYUCCL/psiTurk/releases/tag/v3.2.1"
},
{
"source": "cna@vuldb.com",
"tags": [
"Permissions Required"
],
"url": "https://vuldb.com/?ctiid.219676"
},
{
"source": "cna@vuldb.com",
"tags": [
"Permissions Required"
],
"url": "https://vuldb.com/?id.219676"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch"
],
"url": "https://github.com/NYUCCL/psiTurk/commit/47787e15cecd66f2aa87687bf852ae0194a4335f"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Issue Tracking"
],
"url": "https://github.com/NYUCCL/psiTurk/pull/517"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Release Notes"
],
"url": "https://github.com/NYUCCL/psiTurk/releases/tag/v3.2.1"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Permissions Required"
],
"url": "https://vuldb.com/?ctiid.219676"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Permissions Required"
],
"url": "https://vuldb.com/?id.219676"
}
],
"sourceIdentifier": "cna@vuldb.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-1336"
}
],
"source": "cna@vuldb.com",
"type": "Secondary"
},
{
"description": [
{
"lang": "en",
"value": "CWE-94"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"current_release_date": "2025-05-29T05:04:33+00:00",
"cve": "CVE-2021-4315",
"id": "CVE-2021-4315",
"initial_release_date": "2021-01-01T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "NYUCCL psiTurk experiment.py special elements used in a template engine",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-4315.json",
"version": "3"
}
}
}
Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
Loading timeline…
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.
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.