CVE-2020-17476: Mibew Messenger before 3.2.7 allows XSS via a crafted user name.

Q: How do I fix CVE-2020-17476?

messenger: upgrade to 3.2.7. Exact commands for each OS are on this page.

Q: Is CVE-2020-17476 being exploited?

CVE-2020-17476 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-17476 affect?

CVE-2020-17476 affects messenger. Severity is medium (CVSS 6.1). Mibew Messenger before 3.2.7 allows XSS via a crafted user name.

Q: How urgent is CVE-2020-17476?

Priority 34/100. No elevated risk signals yet.

Routine

MEDIUM 6.1UPGRADE

CVE-2020-17476 is a medium-severity flaw (CVSS 6.1) affecting messenger. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Mibew Messenger before 3.2.7 allows XSS via a crafted user name.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.7% (top 47%)
CISA exploited list	No
Weakness	CWE-79
Published	2020-08-10
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: mibew

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

Am I affected?

Timeline

2020-08-10 17:15 UTCPublished CVE record published
2026-06-17 02:58 UTCUpdated Record last modified

mibew messenger UPGRADE

Affected: < 3.2.7

Fixed in: 3.2.7

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 3.2.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade messenger

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade messenger

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2020-17476?

messenger: upgrade to 3.2.7. Exact commands for each OS are on this page.

Is CVE-2020-17476 being exploited?

CVE-2020-17476 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-2020-17476 affect?

CVE-2020-17476 affects messenger. Severity is medium (CVSS 6.1). Mibew Messenger before 3.2.7 allows XSS via a crafted user name.

How urgent is CVE-2020-17476?

Priority 34/100. No elevated risk signals yet.

Related CVEs

CVE-2023-30097 MEDIUM 5.4 MITIGATE A stored cross-site scripting (XSS) vulnerability in TotalJS messenger commit b6cf1c9 allows attackers to exec
CVE-2023-30096 MEDIUM 5.4 MITIGATE A stored cross-site scripting (XSS) vulnerability in TotalJS messenger commit b6cf1c9 allows attackers to exec
CVE-2023-30095 MEDIUM 5.4 MITIGATE A stored cross-site scripting (XSS) vulnerability in TotalJS messenger commit b6cf1c9 allows attackers to exec
CVE-2022-41708 MEDIUM 4.3 MITIGATE Relatedcode's Messenger version 7bcd20b allows an authenticated external attacker to access existing chats in
CVE-2022-41707 MEDIUM 6.5 MITIGATE Relatedcode's Messenger version 7bcd20b allows an authenticated external attacker to access sensitive data of

References

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