CVE-2019-11454

Name: CVE-2019-11454
Creator: NVD / NIST
Published: 2019-04-22T16:29:01.49+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 2.41%

Last modified Jun 17, 2026

CVE-2019-11454 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. Persistent cross-site scripting (XSS) in http/cervlet.c in Tildeslash Monit before 5.25.3 allows a remote unauthenticated attacker to introduce arbitrary JavaScript via manipulation of an unsanitized user field of the Authorization header for HTTP Basic Authentication, which is mishandled during an _viewlog operation.. EPSS estimates a 2.41% chance of exploitation in the next 30 days.

Description

Persistent cross-site scripting (XSS) in http/cervlet.c in Tildeslash Monit before 5.25.3 allows a remote unauthenticated attacker to introduce arbitrary JavaScript via manipulation of an unsanitized user field of the Authorization header for HTTP Basic Authentication, which is mishandled during an _viewlog operation.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

2.41%

82.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Mmonit	Monit	< 5.25.3
Canonical	Ubuntu Linux	18.10
Canonical	Ubuntu Linux	19.04
Debian	Debian Linux	8.0
Debian	Debian Linux	9.0
Fedoraproject	Fedora	31
Fedoraproject	Fedora	32

References

https://bitbucket.org/tildeslash/monit/commits/1a8295eab6815072a18019b668fe084945b751f3Patch, Third Party Advisory
https://bitbucket.org/tildeslash/monit/commits/328f60773057641c4b2075fab9820145e95b728cPatch, Third Party Advisory
https://github.com/dzflack/exploits/blob/master/unix/monit_xss.pyExploit, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/04/msg00028.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/12/msg00018.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HZQDHRSKTEX5MSYXNCGFTUSFGANBARHX/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L475QJMFFI2QV5QEHAKKPVX6QX6ECUL6/
https://usn.ubuntu.com/3971-1/Third Party Advisory
https://bitbucket.org/tildeslash/monit/commits/1a8295eab6815072a18019b668fe084945b751f3Patch, Third Party Advisory
https://bitbucket.org/tildeslash/monit/commits/328f60773057641c4b2075fab9820145e95b728cPatch, Third Party Advisory
https://github.com/dzflack/exploits/blob/master/unix/monit_xss.pyExploit, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/04/msg00028.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/12/msg00018.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HZQDHRSKTEX5MSYXNCGFTUSFGANBARHX/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L475QJMFFI2QV5QEHAKKPVX6QX6ECUL6/
https://usn.ubuntu.com/3971-1/Third Party Advisory

Timeline

Published: Apr 22, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-11454?

How severe is CVE-2019-11454?

CVE-2019-11454 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 2.41% probability of exploitation in the next 30 days.

How do I fix CVE-2019-11454?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-11454?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST