CVE-2021-45889: An issue was discovered in PONTON X/P Messenger before 3.11.2

Routine

MEDIUM 5.4DOWNGRADE

CVE-2021-45889 is a medium-severity flaw (CVSS 5.4) affecting x\/p messenger. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in PONTON X/P Messenger before 3.11.2. Several functions are vulnerable to reflected XSS, as demonstrated by private/index.jsp?partners/ShowNonLocalPartners.do?localID= or private/index.jsp or private/index.jsp?database/databaseTab.jsp or private/index.jsp?activation/activationMainTab.jsp or private/index.jsp?communication/serverTab.jsp or private/index.jsp?emailNotification/notificationTab.jsp.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.6% (top 52%)
CISA exploited list	No
Weakness	CWE-79
Published	2022-03-13
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: ponton

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-03-13 02:15 UTCPublished CVE record published
2026-06-17 04:14 UTCUpdated Record last modified

ponton x\/p messenger DOWNGRADE

Affected: 3.8.0 · 3.10.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.8.0

1. Check installed version

apt-cache policy xp-messenger || rpm -q xp-messenger || xp-messenger --version

2. No fixed release: DOWNGRADE to a release before 3.8.0 (Debian / Ubuntu)

apt-cache madison xp-messenger sudo apt install xp-messenger=<VERSION_BEFORE_3.8.0> sudo apt-mark hold xp-messenger

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list xp-messenger sudo dnf downgrade xp-messenger-<VERSION_BEFORE_3.8.0> sudo dnf versionlock add xp-messenger

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-45889?

x\/p messenger: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-45889 being exploited?

CVE-2021-45889 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-45889 affect?

CVE-2021-45889 affects x\/p messenger. Severity is medium (CVSS 5.4). An issue was discovered in PONTON X/P Messenger before 3.11.2. Several functions are vulnerable to reflected XSS, as demonstrated by private/index.jsp?partners/ShowNonLocalPartners.do?localID= or private/index.jsp or private/index.jsp?datab

How urgent is CVE-2021-45889?

Priority 36/100. Public exploit reference

Related CVEs

CVE-2021-45888 MEDIUM 4.8 DOWNGRADE An issue was discovered in PONTON X/P Messenger before 3.11.2
CVE-2021-45887 CRITICAL 9.8 DOWNGRADE An issue was discovered in PONTON X/P Messenger before 3.11.2
CVE-2021-45886 HIGH 8.8 DOWNGRADE An issue was discovered in PONTON X/P Messenger before 3.11.2

References

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