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CVE-2021-32746

Possible path traversal by use of the `doc` module

5.3 MediumFix available

Icinga Web 2 is an open source monitoring web interface, framework and command-line interface. Between versions 2.3.0 and 2.8.2, the doc module of Icinga Web 2 allows to view documentation directly in the UI. It must be enabled manually by an administrator and users need explicit access permission to use it. Then, by visiting a certain route, it is possible to gain access to arbitrary files readable by the web-server user. The issue has been fixed in the 2.9.0, 2.8.3, and 2.7.5 releases. As a workaround, an administrator may disable the doc module or revoke permission to use it from all users.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
None
Availability
None

Exploit likelihood

1.31%Up 0.2 points since Jul 13, 2021
90%50%10%1%

What each source reports

CVE List Score used 5.3

Possible path traversal by use of the `doc` module

Icinga Web 2 is an open source monitoring web interface, framework and command-line interface. Between versions 2.3.0 and 2.8.2, the doc module of Icinga Web 2 allows to view documentation directly in the UI. It must be enabled manually by an administrator and users need explicit access permission to use it. Then, by visiting a certain route, it is possible to gain access to arbitrary files readable by the web-server user. The issue has been fixed in the 2.9.0, 2.8.3, and 2.7.5 releases. As a workaround, an administrator may disable the doc module or revoke permission to use it from all users.

Record
CVE-2021-32746
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-22
Updated
2026-11-02
EUVDEUVD-2021-19518 5.3

Icinga Web 2 is an open source monitoring web interface, framework and command-line interface. Between versions 2.3.0 and 2.8.2, the doc module of Icinga Web 2 allows to view documentation directly in the UI. It must be enabled manually by an administrator and users need explicit access permission to use it. Then, by visiting a certain route, it is possible to gain access to arbitrary files readable by the web-server user. The issue has been fixed in the 2.9.0, 2.8.3, and 2.7.5 releases. As a workaround, an administrator may disable the doc module or revoke permission to use it from all users.

Record
EUVD-2021-19518
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-03
NVD 5.3

Icinga Web 2 is an open source monitoring web interface, framework and command-line interface. Between versions 2.3.0 and 2.8.2, the doc module of Icinga Web 2 allows to view documentation directly in the UI. It must be enabled manually by an administrator and users need explicit access permission to use it. Then, by visiting a certain route, it is possible to gain access to arbitrary files readable by the web-server user. The issue has been fixed in the 2.9.0, 2.8.3, and 2.7.5 releases. As a workaround, an administrator may disable the doc module or revoke permission to use it from all users.

Record
CVE-2021-32746
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS 2.0
3.5 LowAV:N/AC:M/Au:S/C:P/I:N/A:N
Weakness
CWE-22
Updated
2026-11-02
OSVALPINE-CVE-2021-32746 5.3

Icinga Web 2 is an open source monitoring web interface, framework and command-line interface. Between versions 2.3.0 and 2.8.2, the doc module of Icinga Web 2 allows to view documentation directly in the UI. It must be enabled manually by an administrator and users need explicit access permission to use it. Then, by visiting a certain route, it is possible to gain access to arbitrary files readable by the web-server user. The issue has been fixed in the 2.9.0, 2.8.3, and 2.7.5 releases. As a workaround, an administrator may disable the doc module or revoke permission to use it from all users.

Record
ALPINE-CVE-2021-32746
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-03
OSV 5.3

Icinga Web 2 is an open source monitoring web interface, framework and command-line interface. Between versions 2.3.0 and 2.8.2, the doc module of Icinga Web 2 allows to view documentation directly in the UI. It must be enabled manually by an administrator and users need explicit access permission to use it. Then, by visiting a certain route, it is possible to gain access to arbitrary files readable by the web-server user. The issue has been fixed in the 2.9.0, 2.8.3, and 2.7.5 releases. As a workaround, an administrator may disable the doc module or revoke permission to use it from all users.

Record
CVE-2021-32746
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVDEBIAN-CVE-2021-32746 5.3

Icinga Web 2 is an open source monitoring web interface, framework and command-line interface. Between versions 2.3.0 and 2.8.2, the doc module of Icinga Web 2 allows to view documentation directly in the UI. It must be enabled manually by an administrator and users need explicit access permission to use it. Then, by visiting a certain route, it is possible to gain access to arbitrary files readable by the web-server user. The issue has been fixed in the 2.9.0, 2.8.3, and 2.7.5 releases. As a workaround, an administrator may disable the doc module or revoke permission to use it from all users.

Record
DEBIAN-CVE-2021-32746
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVUBUNTU-CVE-2021-32746 5.3

Icinga Web 2 is an open source monitoring web interface, framework and command-line interface. Between versions 2.3.0 and 2.8.2, the doc module of Icinga Web 2 allows to view documentation directly in the UI. It must be enabled manually by an administrator and users need explicit access permission to use it. Then, by visiting a certain route, it is possible to gain access to arbitrary files readable by the web-server user. The issue has been fixed in the 2.9.0, 2.8.3, and 2.7.5 releases. As a workaround, an administrator may disable the doc module or revoke permission to use it from all users.

Record
UBUNTU-CVE-2021-32746
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
icingaweb2
Alpine:v3.15
before 2.9.0-r0
2.9.0-r0
icingaweb2
Alpine:v3.16
before 2.9.0-r0
2.9.0-r0
icingaweb2
Alpine:v3.17
before 2.9.0-r0
2.9.0-r0
icingaweb2
Alpine:v3.18
before 2.9.0-r0
2.9.0-r0
icingaweb2
Alpine:v3.19
before 2.9.0-r0
2.9.0-r0
icingaweb2
Alpine:v3.20
before 2.9.0-r0
2.9.0-r0
icingaweb2
Alpine:v3.21
before 2.9.0-r0
2.9.0-r0
icingaweb2
Alpine:v3.22
before 2.9.0-r0
2.9.0-r0
icingaweb2
Alpine:v3.23
before 2.9.0-r0
2.9.0-r0
icingaweb2
Alpine:v3.24
before 2.9.0-r0
2.9.0-r0
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Affected packages
PackageAffectedFixed
icingaweb2
Debian:12
before 2.8.4-1
2.8.4-1
icingaweb2
Debian:13
before 2.8.4-1
2.8.4-1
icingaweb2
Debian:14
before 2.8.4-1
2.8.4-1
icingaweb2
Ubuntu:16.04:LTS
All versions, plus listed versions
2.1.0-1ubuntu12.1.0-1ubuntu1.12.1.0-1ubuntu1.2
None known
icingaweb2
Ubuntu:18.04:LTS
All versions, plus listed versions
2.4.1-12.4.1-1ubuntu0.1
None known
icingaweb2
Ubuntu:20.04:LTS
All versions, plus listed versions
2.7.1-12.7.3-1
None known
icingaweb2
Ubuntu:22.04:LTS
All versions, plus listed versions
2.8.2-22.9.3-12.9.4-12.9.5-1
None known
icingaweb2
Ubuntu:24.04:LTS
All versions, plus listed versions
2.11.4-32.12.0-12.12.1-1
None known
icingaweb2
Ubuntu:25.10
All versions, plus listed versions
2.12.2-12.12.4-12.12.4-2
None known
icingaweb2
Ubuntu:26.10
All versions, plus listed versions
2.12.6-12.13.0-12.14.0-1
None known
icingaweb2
Ubuntu:26.04:LTS
All versions, plus listed versions
2.12.4-22.12.5-12.12.6-1
None known

History

History
RecordedChangedSources
affected, aliases, referencesOSV
aliasesEUVD
first indexedCVE List, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-32746 is a medium vulnerability (CVSS 5.3) in Icinga, published July 12, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.31%, the 70th percentile. Fixed in icingaweb2 2.9.0-r0.

References

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