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CVE-2020-13977

Nagios 4.4.5 allows an attacker, who already has administrative access to change the "URL for...

4.9 MediumFix available

Nagios 4.4.5 allows an attacker, who already has administrative access to change the "URL for JSON CGIs" configuration setting, to modify the Alert Histogram and Trends code via crafted versions of the archivejson.cgi, objectjson.cgi, and statusjson.cgi files. NOTE: this vulnerability has been mistakenly associated with CVE-2020-1408.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
High
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
High
Availability
None

Exploit likelihood

2.73%Up 1.3 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 4.9

Nagios 4.4.5 allows an attacker, who already has administrative access to change the "URL for JSON CGIs" configuration setting, to modify the Alert Histogram and Trends code via crafted versions of the archivejson.cgi, objectjson.cgi, and statusjson.cgi files. NOTE: this vulnerability has been mistakenly associated with CVE-2020-1408.

Record
CVE-2020-13977
CVSS 3.1
4.9 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
CVSS 2.0
4.0 MediumAV:N/AC:L/Au:S/C:N/I:P/A:N
Weakness
CWE-829
Updated
2026-11-02
CVE List No score

Nagios 4.4.5 allows an attacker, who already has administrative access to change the "URL for JSON CGIs" configuration setting, to modify the Alert Histogram and Trends code via crafted versions of the archivejson.cgi, objectjson.cgi, and statusjson.cgi files. NOTE: this vulnerability has been mistakenly associated with CVE-2020-1408.

Record
CVE-2020-13977
Updated
2026-11-02
EUVDEUVD-2020-6148 No score

Nagios 4.4.5 allows an attacker, who already has administrative access to change the "URL for JSON CGIs" configuration setting, to modify the Alert Histogram and Trends code via crafted versions of the archivejson.cgi, objectjson.cgi, and statusjson.cgi files. NOTE: this vulnerability has been mistakenly associated with CVE-2020-1408.

Record
EUVD-2020-6148
Updated
2026-11-03
GitHub AdvisoriesGHSA-c962-q9ch-7qhw No score

Nagios 4.4.5 allows an attacker, who already has administrative access to change the "URL for...

Nagios 4.4.5 allows an attacker, who already has administrative access to change the "URL for JSON CGIs" configuration setting, to modify the Alert Histogram and Trends code via crafted versions of the archivejson.cgi, objectjson.cgi, and statusjson.cgi files.

Record
GHSA-c962-q9ch-7qhw
Weakness
CWE-74
Updated
2026-11-02
OSV 4.9

Nagios 4.4.5 allows an attacker, who already has administrative access to change the "URL for JSON CGIs" configuration setting, to modify the Alert Histogram and Trends code via crafted versions of the archivejson.cgi, objectjson.cgi, and statusjson.cgi files. NOTE: this vulnerability has been mistakenly associated with CVE-2020-1408.

Record
CVE-2020-13977
CVSS 3.1
4.9 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Updated
2026-11-02
OSVDEBIAN-CVE-2020-13977 4.9

Nagios 4.4.5 allows an attacker, who already has administrative access to change the "URL for JSON CGIs" configuration setting, to modify the Alert Histogram and Trends code via crafted versions of the archivejson.cgi, objectjson.cgi, and statusjson.cgi files. NOTE: this vulnerability has been mistakenly associated with CVE-2020-1408.

Record
DEBIAN-CVE-2020-13977
CVSS 3.1
4.9 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Updated
2026-11-02
Show 5 moreShow less
OSVUBUNTU-CVE-2020-13977 4.9

Nagios 4.4.5 allows an attacker, who already has administrative access to change the "URL for JSON CGIs" configuration setting, to modify the Alert Histogram and Trends code via crafted versions of the archivejson.cgi, objectjson.cgi, and statusjson.cgi files. NOTE: this vulnerability has been mistakenly associated with CVE-2020-1408.

Record
UBUNTU-CVE-2020-13977
CVSS 3.1
4.9 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Updated
2026-11-02
OSVMGASA-2021-0209 No score

Updated nagios packages fix a security vulnerability

Nagios 4.4.5 allows an attacker, who already has administrative access to change the "URL for JSON CGIs" configuration setting, to modify the Alert Histogram and Trends code via crafted versions of the archivejson.cgi, objectjson.cgi, and statusjson.cgi files (CVE-2020-13977).

Record
MGASA-2021-0209
Updated
2026-11-02
OSVopenSUSE-SU-2021:0715-1 No score

Security update for nagios

This update for nagios fixes the following issues:

  • new nagios-exec-start-post script to fix boo#1003362

  • fix nagios_upgrade.sh writing to log file in user controlled directory (boo#1182398). The nagios_upgrade.sh script writes the logfile directly below /var/log/

nagios was updated to 4.4.6:

  • Fixed Map display in Internet Explorer 11 (#714)

  • Fixed duplicate properties appearing in statusjson.cgi (#718)

  • Fixed NERD not building when enabled in ./configure (#723)

  • Fixed build process when using GCC 10 (#721)

  • Fixed postauth vulnerabilities in histogram.js, map.js, trends.js (CVE-2020-13977, boo#1172794)

  • When using systemd, configuration will be verified before reloading (#715)

  • Fixed HARD OK states triggering on the maximum check attempt (#757)

  • Fix for CVE-2016-6209 (boo#989759) - The 'corewindow' parameter (as in bringing this to our attention go to Dawid Golunski (boo#1014637)

Record
openSUSE-SU-2021:0715-1
Updated
2026-11-02
OSVopenSUSE-SU-2021:0735-1 No score

Security update for nagios

This update for nagios fixes the following issues:

  • new nagios-exec-start-post script to fix boo#1003362

  • fix nagios_upgrade.sh writing to log file in user controlled directory (boo#1182398). The nagios_upgrade.sh script writes the logfile directly below /var/log/

nagios was updated to 4.4.6:

  • Fixed Map display in Internet Explorer 11 (#714)

  • Fixed duplicate properties appearing in statusjson.cgi (#718)

  • Fixed NERD not building when enabled in ./configure (#723)

  • Fixed build process when using GCC 10 (#721)

  • Fixed postauth vulnerabilities in histogram.js, map.js, trends.js (CVE-2020-13977, boo#1172794)

  • When using systemd, configuration will be verified before reloading (#715)

  • Fixed HARD OK states triggering on the maximum check attempt (#757)

  • Fix for CVE-2016-6209 (boo#989759) - The 'corewindow' parameter (as in bringing this to our attention go to Dawid Golunski (boo#1014637)

This update was imported from the openSUSE:Leap:15.2:Update update project.

Record
openSUSE-SU-2021:0735-1
Updated
2026-11-02
OSVopenSUSE-SU-2024:11073-1 No score

nagios-4.4.6-2.5 on GA media

These are all security issues fixed in the nagios-4.4.6-2.5 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:11073-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
nagios4
Debian:12
 before 4.3.4-4
4.3.4-4
nagios4
Debian:13
 before 4.3.4-4
4.3.4-4
nagios4
Debian:14
 before 4.3.4-4
4.3.4-4
nagios
Mageia:7
 before 4.4.3-2.1.mga7
4.4.3-2.1.mga7
nagios4
Ubuntu:20.04:LTS
 All versions, plus listed versions
4.3.4-34.3.4-3ubuntu0.1
 None known
nagios
openSUSE:Leap 15.2
From an advisory covering 2 CVEs
 before 4.4.6-lp152.2.3.1
4.4.6-lp152.2.3.1
nagios
SUSE:Package Hub 15 SP2
From an advisory covering 2 CVEs
 before 4.4.6-bp152.2.3.1
4.4.6-bp152.2.3.1
nagios
openSUSE:Tumbleweed
From an advisory covering 17 CVEs
 before 4.4.6-2.5
4.4.6-2.5

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

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

In short

CVE-2020-13977 is a medium vulnerability (CVSS 4.9) in Nagios, published June 9, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.73%, the 86th percentile. Fixed in nagios4 4.3.4-4.

References

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