What is CVE-2012-1109?

CVE-2012-1109 is a high-severity vulnerability in Pediapress Mwlib, classified under Improper Handling of Exceptional Conditions. CVSS score: 7.5/10. Published 2019-11-12.

How severe is CVE-2012-1109?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Pediapress Mwlib

CVE-2012-1109

mwlib 0.13 through 0.13.4 has a denial of service vulnerability when parsing #iferror magic functions

Published 2019-11-12 · last modified 2026-06-16.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.021 (80.8th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 81st percentile — 80.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.021 · newest: 0.021 · change: 0.000

Affected products

Pediapress Mwlib
Python Mwlib — versions 0.13 through 0.13.4 (Fixed in 0.13.5)

Weakness classification (CWE)

CWE-755 — Improper Handling of Exceptional Conditions

References

bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
www.openwall.com/lists/oss-security/2012/03/05/20 (Patch, Mailing List, Third Party Advisory)
www.securityfocus.com/bid/52577 (VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2012-1109?: CVE-2012-1109 is a high-severity vulnerability in Pediapress Mwlib, classified under Improper Handling of Exceptional Conditions. CVSS score: 7.5/10. Published 2019-11-12.
How severe is CVE-2012-1109?: High severity. CVSS v3 base score is 7.5 out of 10.