What is CVE-2017-6913?

CVE-2017-6913 is a medium-severity vulnerability in Open-Xchange Appsuite, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-09-18.

How severe is CVE-2017-6913?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2017-6913 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Open-Xchange Appsuite

CVE-2017-6913

Cross-site scripting (XSS) vulnerability in the Open-Xchange webmail before 7.6.3-rev28 allows remote attackers to inject arbitrary web script or HTML via the event attribute in a time tag.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2018-09-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.010 (60.2th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Open-Xchange Appsuite

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

gquere/CVE-2017-6913

References

software.open-xchange.com/products/appsuite/doc/Release_Notes_for_Patch_Release… (Release Notes, Vendor Advisory)
github.com/gquere/CVE-2017-6913 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2017-6913?: CVE-2017-6913 is a medium-severity vulnerability in Open-Xchange Appsuite, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-09-18.
How severe is CVE-2017-6913?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2017-6913 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.