What is CVE-2023-45879?

CVE-2023-45879 is a medium-severity vulnerability in Gibbonedu Gibbon, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-11-14.

How severe is CVE-2023-45879?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Is CVE-2023-45879 known to be exploited?

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

XSS in Gibbonedu Gibbon

CVE-2023-45879

GibbonEdu Gibbon version 25.0.0 allows HTML Injection via an IFRAME element to the Messager component.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-11-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.005 (37.6th percentile), scored 2026-09-26.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Gibbonedu Gibbon

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

herolab.usd.de/security-advisories/usd-2023-0019/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2023-45879?: CVE-2023-45879 is a medium-severity vulnerability in Gibbonedu Gibbon, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-11-14.
How severe is CVE-2023-45879?: Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2023-45879 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.