+V5.2 File Upload and Content
---+V5.2.1 Verify that the application will only accept files of a size which it can process without causing a …
---+V5.2.2 Verify that when the application accepts a file, either on its own or within an archive such as a …
---+V5.2.3 Verify that the application checks compressed files (e.g., zip, gz, docx, odt) against maximum …
---+V5.2.4 Verify that a file size quota and maximum number of files per user are enforced to ensure that a …
---+V5.2.5 Verify that the application does not allow uploading compressed files containing symlinks unless …
---+V5.2.6 Verify that the application rejects uploaded images with a pixel size larger than the maximum …

V5.2 File Upload and Content

File upload functionality is a primary source of untrusted files. This section outlines the requirements for ensuring that the presence, volume, or content of these files cannot harm the application.

1. Pregled

Naslov	Standard
V5.2.1 Verify that the application will only accept files of a size which it can process without causing a …	Verify that the application will only accept files of a size which it can process without causing a loss of performance or a denial of service attack.
V5.2.2 Verify that when the application accepts a file, either on its own or within an archive such as a …	Verify that when the application accepts a file, either on its own or within an archive such as a zip file, it checks if the file extension matches an expected file extension and validates that the contents correspond to the type represented by the extension. This includes, but is not limited to, checking the initial 'magic bytes', performing image re-writing, and using specialized libraries for file content validation. For L1, this can focus just on files which are used to make specific business or security decisions. For L2 and up, this must apply to all files being accepted.
V5.2.3 Verify that the application checks compressed files (e.g., zip, gz, docx, odt) against maximum …	Verify that the application checks compressed files (e.g., zip, gz, docx, odt) against maximum allowed uncompressed size and against maximum number of files before uncompressing the file.
V5.2.4 Verify that a file size quota and maximum number of files per user are enforced to ensure that a …	Verify that a file size quota and maximum number of files per user are enforced to ensure that a single user cannot fill up the storage with too many files, or excessively large files.
V5.2.5 Verify that the application does not allow uploading compressed files containing symlinks unless …	Verify that the application does not allow uploading compressed files containing symlinks unless this is specifically required (in which case it will be necessary to enforce an allowlist of the files that can be symlinked to).
V5.2.6 Verify that the application rejects uploaded images with a pixel size larger than the maximum …	Verify that the application rejects uploaded images with a pixel size larger than the maximum allowed, to prevent pixel flood attacks.

1.1 Sklici

1.2 Ugotovljene zahteve

1.3 Povezani predpisi

2. Ugotovljene zahteve

Zahteve
Vir	Zahteva

3. Povezani predpisi

Predpisi
Vir	Regulativa

OWASP -
EN: Publications of the OWASP Foundation, https://owasp.org/. OWASP® is a registered trademark of the OWASP Foundation, Inc.; GRCA is not affiliated with, nor endorsed by, the OWASP Foundation. Only the versions published by OWASP are authoritative.
- OWASP Application Security Verification Standard (ASVS) 5.0.0, May 2025, from OWASP/ASVS: © 2008-2025 The OWASP Foundation, licensed under CC BY-SA 4.0. Changes: divided into sections and converted into the GRCA format, the wording unchanged. These adaptations are shared under CC BY-SA 4.0 as well.
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- OWASP Mobile Application Security Weakness Enumeration (MASWE) v1.0.0, August 2026, from OWASP/maswe: © The OWASP Foundation, licensed under CC BY-SA 4.0. Changes: converted into the GRCA format, the wording unchanged, linked to the MASVS controls they map to. These adaptations are shared under CC BY-SA 4.0 as well.
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- OWASP Software Assurance Maturity Model (SAMM) v2.2.0, July 2026, from owaspsamm/core: © The OWASP Foundation, licensed under CC BY-SA 4.0. Changes: converted into the GRCA format, the wording unchanged; short codes (G-SM-1-A) built from the model, the assessment questions as assessment procedures of their activities. These adaptations are shared under CC BY-SA 4.0 as well.
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- OWASP Application Security Verification Standard (ASVS) 5.0.0, Mai 2025, aus OWASP/ASVS: © 2008-2025 The OWASP Foundation, lizenziert unter CC BY-SA 4.0. Änderungen: in Abschnitte aufgeteilt und in das GRCA-Format umgewandelt, der Wortlaut unverändert. Diese Bearbeitungen stehen ebenfalls unter CC BY-SA 4.0.
- OWASP Mobile Application Security Verification Standard (MASVS) v2.1.0, Januar 2024, aus OWASP/masvs: © The OWASP Foundation, lizenziert unter CC BY-SA 4.0. Änderungen: in das GRCA-Format umgewandelt, der Wortlaut unverändert. Diese Bearbeitungen stehen ebenfalls unter CC BY-SA 4.0.
- OWASP Mobile Application Security Weakness Enumeration (MASWE) v1.0.0, August 2026, aus OWASP/maswe: © The OWASP Foundation, lizenziert unter CC BY-SA 4.0. Änderungen: in das GRCA-Format umgewandelt, der Wortlaut unverändert, mit den MASVS-Controls verknüpft, denen sie zugeordnet sind. Diese Bearbeitungen stehen ebenfalls unter CC BY-SA 4.0.
- OWASP Mobile Application Security Testing Guide (MASTG) v2.0.0, Juni 2026, aus OWASP/mastg: © The OWASP Foundation, lizenziert unter CC BY-SA 4.0. Nur die Tests und Best Practices, ohne Codebeispiele, Bilder, Werkzeuge und Apps. Änderungen: in das GRCA-Format umgewandelt, der Wortlaut unverändert; Verweise auf andere Seiten des MASTG als Links zu mas.owasp.org; die Schwachstelle jedes Tests in der Nummerierung der MASWE v1 und mit ihr verknüpft. Diese Bearbeitungen stehen ebenfalls unter CC BY-SA 4.0.
- OWASP Software Assurance Maturity Model (SAMM) v2.2.0, Juli 2026, aus owaspsamm/core: © The OWASP Foundation, lizenziert unter CC BY-SA 4.0. Änderungen: in das GRCA-Format umgewandelt, der Wortlaut unverändert; Kürzel (G-SM-1-A) aus dem Modell gebildet, die Assessment-Fragen als Prüfverfahren ihrer Aktivitäten. Diese Bearbeitungen stehen ebenfalls unter CC BY-SA 4.0.
- OWASP Top 10:2025, aus OWASP/Top10: © 2003-2025 The OWASP® Foundation, Inc., lizenziert unter CC BY-SA 4.0. Die zehn Kategorien, ohne die Symbole. Änderungen: in das GRCA-Format umgewandelt, der Wortlaut unverändert. Diese Bearbeitungen stehen ebenfalls unter CC BY-SA 4.0. Die Namen der zugeordneten CWEs (Common Weakness Enumeration): © 2006–2026 The MITRE Corporation. MITRE erlaubt die Nutzung für Forschung, Entwicklung und kommerzielle Zwecke, wenn jede Kopie den Urheberrechtsvermerk und die Lizenz enthält; maßgeblich ist der englische Wortlaut der Lizenz oben und die CWE Terms of Use. CWE™ ist eine Marke der MITRE Corporation.