CVE-2021-23927

Name: CVE-2021-23927
Creator: NVD / NIST
Published: 2021-01-12T22:15:12.447+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.4/10EPSS 0.76%

Last modified Jun 17, 2026

CVE-2021-23927 is a medium-severity vulnerability rated 6.4/10 on the CVSS scale. OX App Suite through 7.10.4 allows SSRF via a URL with an @ character in an appsuite/api/oauth/proxy PUT request.. EPSS estimates a 0.76% chance of exploitation in the next 30 days.

Description

OX App Suite through 7.10.4 allows SSRF via a URL with an @ character in an appsuite/api/oauth/proxy PUT request.

Metrics

CVSS 3.1

6.4/10

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

EPSS Probability

0.76%

50.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-918

Affected Software

Vendor	Product	Versions
Open-Xchange	Open-Xchange Appsuite	<= 7.10.4

References

https://packetstormsecurity.com/files/160853/OX-App-Suite-OX-Documents-7.10.x-XSS-SSRF.htmlThird Party Advisory, VDB Entry
https://packetstormsecurity.com/files/160853/OX-App-Suite-OX-Documents-7.10.x-XSS-SSRF.htmlThird Party Advisory, VDB Entry

Timeline

Published: Jan 12, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-23927?

OX App Suite through 7.10.4 allows SSRF via a URL with an @ character in an appsuite/api/oauth/proxy PUT request.

How severe is CVE-2021-23927?

CVE-2021-23927 has a CVSS score of 6.4/10 (MEDIUM severity). The EPSS model estimates a 0.76% probability of exploitation in the next 30 days.

How do I fix CVE-2021-23927?

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-2021-23927?

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

Scan your code now

Source: NVD / NIST