CVE-2021-32917

Name: CVE-2021-32917
Creator: NVD / NIST
Published: 2021-05-13T16:15:08.29+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 2.17%

Last modified Jun 17, 2026

CVE-2021-32917 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. An issue was discovered in Prosody before 0.11.9. The proxy65 component allows open access by default, even if neither of the users has an XMPP account on the local server, allowing unrestricted use of the server's bandwidth.. EPSS estimates a 2.17% chance of exploitation in the next 30 days.

Description

An issue was discovered in Prosody before 0.11.9. The proxy65 component allows open access by default, even if neither of the users has an XMPP account on the local server, allowing unrestricted use of the server's bandwidth.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

2.17%

80.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-862

Affected Software

Vendor	Product	Versions
Prosody	Prosody	< 0.11.9
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0
Fedoraproject	Fedora	32
Fedoraproject	Fedora	33
Fedoraproject	Fedora	34

References

http://www.openwall.com/lists/oss-security/2021/05/13/1Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/05/14/2Mailing List, Mitigation, Third Party Advisory
https://blog.prosody.im/prosody-0.11.9-released/Release Notes, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00016.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6MFFBZWXKPZEVZNQSVJNCUE7WRF3T7DG/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GUN63AHEWB2WRROJHU3BVJRWLONCT2B7/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LWJ2DG2DFJOEFEWOUN26IMYYWGSA2ZEE/
https://security.gentoo.org/glsa/202105-15Third Party Advisory
https://www.debian.org/security/2021/dsa-4916Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/05/13/1Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/05/14/2Mailing List, Mitigation, Third Party Advisory
https://blog.prosody.im/prosody-0.11.9-released/Release Notes, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00016.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6MFFBZWXKPZEVZNQSVJNCUE7WRF3T7DG/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GUN63AHEWB2WRROJHU3BVJRWLONCT2B7/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LWJ2DG2DFJOEFEWOUN26IMYYWGSA2ZEE/
https://security.gentoo.org/glsa/202105-15Third Party Advisory
https://www.debian.org/security/2021/dsa-4916Third Party Advisory

Timeline

Published: May 13, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-32917?

How severe is CVE-2021-32917?

CVE-2021-32917 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 2.17% probability of exploitation in the next 30 days.

How do I fix CVE-2021-32917?

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-2021-32917?

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

Scan your code now

Source: NVD / NIST