CVE-2021-43557

mediumPriorität · beachten · 45EPSS 0.130 · 96. PerzentilExploit · PoCEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

13.0% (96th) EPSS

CVSS 5 · medium

Is it mine?

4 products

Prüfe deine Angriffsfläche

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · bewertet 2026-10-27

The uri-block plugin in Apache APISIX before 2.10.2 uses $request_uri without verification. The $request_uri is the full original request URI without normalization. This makes it possible to construct a URI to bypass the block list on some occasions. For instance, when the block list contains "^/internal/", a URI like `//internal/` can be used to bypass it. Some other plugins also have the same issue. And it may affect the developer's custom plugin.

cvss

Technischer Schweregrad, 0–10. Eine Zeile je Quelle.

7.5

010

Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen⚠ Quellen uneinig · medium–high · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USAusnutzbarkeit 10 · Auswirkung 2.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USAusnutzbarkeit 3.9 · Auswirkung 3.6

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · FSTEC (BDU) RU

v3.17.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:Psecondary · CVSS-BT (t0sche)

schwächen

Die CWE-Schwächeklassen, zu denen dies gehört.

CWE-77USprimärCWE-77US

Exploits (1)

Öffentlicher Proof-of-Concept- und Exploit-Code.

xvnpw/k8s-CVE-2021-43557-pocPoC for CVE-2021-43557PoC · poc_in_github

betroffene Produkte (4)

Betroffene Produkte und Versionsbereiche.

Apache Software Foundation Apache APISIX1.5 → Apache APISIX 1.5*enisa_euvdEU
Apache Software Foundation APISIX≤ 2.10.2fstec_bduRU
apache apisix< 2.10.2nvdUScpe:2.3:a:apache:apisix:*:*:*:*:*:*:*:*
Bitnami apisix< 2.10.2osvUSpkg:bitnami/apisix

Advisories (1)

Hersteller- und Ökosystem-Meldungen dazu.

BIT-apisix-2021-43557Path traversal in request_uri variable2024-03-06vendor · osvUS
The uri-block plugin in Apache APISIX before 2.10.2 uses $request_uri without verification. The $request_uri is the full original request URI without normalization. This makes it possible to construct a URI to bypass the block list on some occasions. For instance, when the block list contains "^/internal/", a URI like `//internal/` can be used to bypass it. Some other plugins also have the same issue. And it may affect the developer's custom plugin.

auch bekannt als (4)

Weitere Namen und Kennungen dieser Entität.

quellen

Welche Quellen diesen Datensatz belegen und wann.

cnnvd enisa_euvd fstec_bdu nvd osv NVD CVE.org MITRE

veröffentlicht 2021-11-22geändert 2026-06-17

verwandt (4,599)

Verwandte Einträge.

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+4594 weitere

Referenzen (14)

Externe Belege — Patches, Meldungen, Analysen.

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