How severe is CVE-2021-21634?

CVE-2021-21634 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-21634 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21634?

CVE-2021-21634 affects Jenkins Jabber (xmpp) Notifier And Control. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-21634?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-21634 published?

CVE-2021-21634 was published on 2021-03-30 and last updated on 2026-06-17.

CVE-2021-21634

CVE-2021-21634 is a medium-severity vulnerability in Jenkins Jabber (xmpp) Notifier And Control with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-522.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-522
Affected product: Jenkins Jabber (xmpp) Notifier And Control
Published: 2021-03-30
Last modified: 2026-06-17

Description

Jenkins Jabber (XMPP) notifier and control Plugin 1.41 and earlier stores passwords unencrypted in its global configuration file on the Jenkins controller where they can be viewed by users with access to the Jenkins controller file system.

Frequently asked questions

What is CVE-2021-21634?: Jenkins Jabber (XMPP) notifier and control Plugin 1.41 and earlier stores passwords unencrypted in its global configuration file on the Jenkins controller where they can be viewed by users with access to the Jenkins controller file system.
How severe is CVE-2021-21634?: CVE-2021-21634 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-21634 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21634?: CVE-2021-21634 affects Jenkins Jabber (xmpp) Notifier And Control. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-21634?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-21634 published?: CVE-2021-21634 was published on 2021-03-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:jenkins:jabber_\(xmpp\)_notifier_and_control:*:*:*:*:*:jenkins:*:*

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