What is CVE-2023-29489?

CVE-2023-29489 is a medium-severity vulnerability in Cpanel, classified under Cross-site Scripting. CVSS score: 5.3/10. Published 2023-04-27.

How severe is CVE-2023-29489?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Is CVE-2023-29489 known to be exploited?

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

XSS in Cpanel

CVE-2023-29489

An issue was discovered in cPanel before 11.109.9999.116. XSS can occur on the cpsrvd error page via an invalid webcall ID, aka SEC-669. The fixed versions are 11.109.9999.116, 11.108.0.13, 11.106.0.18, and 11.102.0.31.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-04-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.655 (99.3th percentile), scored 2026-10-19.

High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.655 · newest: 0.655 · change: 0.000

Affected products

Cpanel

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

forums.cpanel.net/threads/cpanel-tsr-2023-0001-full-disclosure.708949/ (Vendor Advisory)
blog.assetnote.io/2023/04/26/xss-million-websites-cpanel/ (Exploit)

Frequently asked questions

What is CVE-2023-29489?: CVE-2023-29489 is a medium-severity vulnerability in Cpanel, classified under Cross-site Scripting. CVSS score: 5.3/10. Published 2023-04-27.
How severe is CVE-2023-29489?: Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2023-29489 known to be exploited?: 54 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.