What is CVE-2023-34839?

CVE-2023-34839 is a medium-severity vulnerability in Issabel Pbx, classified under Cross-Site Request Forgery (CSRF). CVSS score: 6.8/10. Published 2023-06-27.

How severe is CVE-2023-34839?

Medium severity. CVSS v3 base score is 6.8 out of 10.

Is CVE-2023-34839 known to be exploited?

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

CSRF in Issabel Pbx

CVE-2023-34839

A Cross Site Request Forgery (CSRF) vulnerability in Issabel issabel-pbx v.4.0.0-6 allows a remote attacker to gain privileges via a Custom CSRF exploit to create new user function in the application.

Vulnerability class: CSRF (Cross-Site Request Forgery)

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

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.007 (49.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 49.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Issabel Pbx — versions 4.0.0-6

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

Public proof-of-concept exploits

References

github.com/sahiloj/CVE-2023-34839/blob/main/README.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2023-34839?: CVE-2023-34839 is a medium-severity vulnerability in Issabel Pbx, classified under Cross-Site Request Forgery (CSRF). CVSS score: 6.8/10. Published 2023-06-27.
How severe is CVE-2023-34839?: Medium severity. CVSS v3 base score is 6.8 out of 10.
Is CVE-2023-34839 known to be exploited?: 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.