What is CVE-2022-45134?

CVE-2022-45134 is a critical-severity vulnerability in Mahara, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2025-08-22.

How severe is CVE-2022-45134?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2022-45134 known to be exploited?

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

Deserialization in Mahara

CVE-2022-45134

Mahara 21.10 before 21.10.6, 22.04 before 22.04.4, and 22.10 before 22.10.1 deserializes user input unsafely during skin import. A particularly structured XML file could cause code execution when being processed.

Vulnerability class: Insecure Deserialization

Published 2025-08-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (48.6th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 48.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Mahara

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

Public proof-of-concept exploits

References

bugs.launchpad.net/mahara/+bug/1993082 (Issue Tracking, Vendor Advisory)
mahara.org/interaction/forum/topic.php (Vendor Advisory)

Frequently asked questions

What is CVE-2022-45134?: CVE-2022-45134 is a critical-severity vulnerability in Mahara, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2025-08-22.
How severe is CVE-2022-45134?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2022-45134 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.