CVE-2021-22204 (GCVE-0-2021-22204)
Vulnerability from cvelistv5 – Published: 2021-04-23 17:22 – Updated: 2025-10-21 23:25Summary
Improper neutralization of user data in the DjVu file format in ExifTool versions 7.44 and up allows arbitrary code execution when parsing the malicious image
Severity
6.8 (Medium)
SSVC
Exploitation: active
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-06 19:49 UTC
CWE
- Improper neutralization of directives in dynamically evaluated code ('eval injection') in ExifTool
- CWE-94 - Improper Control of Generation of Code ('Code Injection')
Assigner
References
15 references
Impacted products
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 3e169a5e-8126-4817-aca0-1fadc0abf4c2
Exploited: Yes
Timestamps
First Seen: 2021-11-17
Asserted: 2021-11-17
Scope
Notes: KEV entry: ExifTool Remote Code Execution Vulnerability | Affected: Perl / Exiftool | Description: Improper neutralization of user data in the DjVu file format in Exiftool versions 7.44 and up allows arbitrary code execution when parsing the malicious image | Required action: Apply updates per vendor instructions. | Due date: 2021-12-01 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://nvd.nist.gov/vuln/detail/CVE-2021-22204
Evidence
Type: Vendor Report
Signal: Successful Exploitation
Confidence: 80%
Source: cisa-kev
Details
| Cwes | CWE-95 |
|---|---|
| Feed | CISA Known Exploited Vulnerabilities Catalog |
| Product | Exiftool |
| Due Date | 2021-12-01 |
| Date Added | 2021-11-17 |
| Vendorproject | Perl |
| Vulnerabilityname | ExifTool Remote Code Execution Vulnerability |
| Knownransomwarecampaignuse | Unknown |
References
Created: 2026-02-02 13:26 UTC
| Updated: 2026-02-06 07:53 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 31bae852-f3e1-45e5-a966-52cd9297385b
Exploited: Yes
Timestamps
First Seen: 2021-11-17
Asserted: 2021-11-17
Scope
Notes: KEVIntel entry: Improper neutralization of user data in the DjVu file format in ExifTool versions 7.44 and up allows arbitrary code execution when parsing the... | Affected: ExifTool / ExifTool | CVSS: 6.8 (MEDIUM) | Used in malware: unknown | Not yet in CISA KEV: False
Evidence
Type: Public Report
Signal: Successful Exploitation
Confidence: 70%
Source: kevintel
Details
| Feed | KEVIntel (kevintel.com) |
|---|---|
| Title | Improper neutralization of user data in the DjVu file format in ExifTool versions 7.44 and up allows arbitrary code execution when parsing the... |
| Vendor | ExifTool |
| Product | ExifTool |
| Added Date | 2021-11-17T00:00:00.000Z |
| Cvss Score | 6.8 |
| Epss Score | None |
| Cvss Severity | MEDIUM |
| Epss Percentile | None |
| Used In Malware | unknown |
| Ahead Of Cisa Kev | None |
| Not Yet In Cisa Kev | False |
References
Created: 2026-06-23 11:13 UTC
| Updated: 2026-06-23 11:13 UTC
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],
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "Improper neutralization of user data in the DjVu file format in ExifTool versions 7.44 and up allows arbitrary code execution when parsing the malicious image"
}
]
},
"impact": {
"cvss": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "LOW",
"baseScore": 6.7,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "AV:L/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L",
"version": "3.1"
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "Improper neutralization of directives in dynamically evaluated code (\u0027eval injection\u0027) in ExifTool"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://github.com/exiftool/exiftool/commit/cf0f4e7dcd024ca99615bfd1102a841a25dde031#diff-fa0d652d10dbcd246e6b1df16c1e992931d3bb717a7e36157596b76bdadb3800",
"refsource": "MISC",
"url": "https://github.com/exiftool/exiftool/commit/cf0f4e7dcd024ca99615bfd1102a841a25dde031#diff-fa0d652d10dbcd246e6b1df16c1e992931d3bb717a7e36157596b76bdadb3800"
},
{
"name": "https://hackerone.com/reports/1154542",
"refsource": "MISC",
"url": "https://hackerone.com/reports/1154542"
},
{
"name": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22204.json",
"refsource": "CONFIRM",
"url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22204.json"
},
{
"name": "DSA-4910",
"refsource": "DEBIAN",
"url": "https://www.debian.org/security/2021/dsa-4910"
},
{
"name": "FEDORA-2021-de850ed71e",
"refsource": "FEDORA",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U4RF6PJCJ6NQOVJJJF6HN6BORUQVIXY6/"
},
{
"name": "FEDORA-2021-e3d8833d36",
"refsource": "FEDORA",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DDKDLJLBTBBR66OOPXSXCG2PQRM5KCZL/"
},
{
"name": "FEDORA-2021-88d24aa32b",
"refsource": "FEDORA",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/F6UOBPU3LSHAPRRJNISNVXZ5DSUIALLV/"
},
{
"name": "[oss-security] 20210509 [CVE-2021-22204] ExifTool - Arbitrary code execution in the DjVu module when parsing a malicious image",
"refsource": "MLIST",
"url": "http://www.openwall.com/lists/oss-security/2021/05/09/1"
},
{
"name": "[oss-security] 20210510 Re: [CVE-2021-22204] ExifTool - Arbitrary code execution in the DjVu module when parsing a malicious image",
"refsource": "MLIST",
"url": "http://www.openwall.com/lists/oss-security/2021/05/10/5"
},
{
"name": "http://packetstormsecurity.com/files/162558/ExifTool-DjVu-ANT-Perl-Injection.html",
"refsource": "MISC",
"url": "http://packetstormsecurity.com/files/162558/ExifTool-DjVu-ANT-Perl-Injection.html"
},
{
"name": "[debian-lts-announce] 20210516 [SECURITY] [DLA 2663-1] libimage-exiftool-perl security update",
"refsource": "MLIST",
"url": "https://lists.debian.org/debian-lts-announce/2021/05/msg00018.html"
},
{
"name": "http://packetstormsecurity.com/files/164768/GitLab-Unauthenticated-Remote-ExifTool-Command-Injection.html",
"refsource": "MISC",
"url": "http://packetstormsecurity.com/files/164768/GitLab-Unauthenticated-Remote-ExifTool-Command-Injection.html"
},
{
"name": "http://packetstormsecurity.com/files/164994/GitLab-13.10.2-Remote-Code-Execution.html",
"refsource": "MISC",
"url": "http://packetstormsecurity.com/files/164994/GitLab-13.10.2-Remote-Code-Execution.html"
},
{
"name": "http://packetstormsecurity.com/files/167038/ExifTool-12.23-Arbitrary-Code-Execution.html",
"refsource": "MISC",
"url": "http://packetstormsecurity.com/files/167038/ExifTool-12.23-Arbitrary-Code-Execution.html"
}
]
}
}
}
},
"cveMetadata": {
"assignerOrgId": "ceab7361-8a18-47b1-92ba-4d7d25f6715a",
"assignerShortName": "GitLab",
"cveId": "CVE-2021-22204",
"datePublished": "2021-04-23T17:22:15.000Z",
"dateReserved": "2021-01-05T00:00:00.000Z",
"dateUpdated": "2025-10-21T23:25:48.455Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
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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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