Which products and versions are affected by CVE-2021-35478?

Affected: Log Server (Nagios). The full list is in the CVE brief.

Is CVE-2021-35478 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2021-35478 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2021-35478?

No public exploit code is known.

Is there a fix for CVE-2021-35478?

Fixed versions are available, including Log Server 2.1.9.

How urgently should CVE-2021-35478 be patched?

Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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Vulnerability Intelligence

CVE-2021-35478

Medium

Nagios Log Server before 2.1.9 contains Reflected XSS in the dropdown box for the alert history and audit log function.

Published Jul 30, 2021 · Updated Nov 21, 2024

Key Facts

Patch immediately

CVE-2021-35478 is a medium-severity vulnerability (CVSS 5.4 v3.1) affecting Log Server (Nagios).
It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
EPSS estimates a 77% probability of exploitation in the next 30 days.
Fixed versions are available, including Log Server 2.1.9.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

CVSS v3.1

5.4

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

EPSS (30-day exploit likelihood)

77%

Higher than 99.5% of all scored CVEs

Exploited in the wild

No known

Not in a known-exploited catalog

Public exploit code

None known

Get the full CVE-2021-35478 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

Nagios Log Server before 2.1.9 contains Reflected XSS in the dropdown box for the alert history and audit log function. All parameters used for filtering are affected. This affects users who open a crafted link or third-party web page.

Affected Products

1 affected entries in total

Product	Affected versions	Fixed in
Log ServerNagios	See advisory	2.1.9

Patched Releases

Log Server

2.1.9

Timeline

Publicly disclosed
Jul 30, 2021
Last updated
Nov 21, 2024

Weakness Type

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

References

FAQ

Common Questions.

Nagios Log Server before 2.1.9 contains Reflected XSS in the dropdown box for the alert history and audit log function.
Affected: Log Server (Nagios). The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Log Server 2.1.9.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

Is CVE-2021-35478 Running On Your Attack Surface?

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