Skip to content
Fencer Vulns
high 7.3

CVE-2021-43266 json

In Mahara before 20.04.5, 20.10.3, 21.04.2, and 21.10.0, exporting collections via PDF export could lead to code execution via shell metach…

published 2021-11-02 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-30210

cvss
7.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.3%
EPSS 1.3% chance of exploitation in 30 days, percentile 71%
public exploits
0
none known

Summary

In Mahara before 20.04.5, 20.10.3, 21.04.2, and 21.10.0, exporting collections via PDF export could lead to code execution via shell metacharacters in a collection name. Additional, in Mahara before 20.10.4, 21.04.3, and 21.10.1, exporting collections via PDF export could cause code execution

Patch / fix

  • mahara mahara 20.04.5, 20.10.3, 20.10.4, 21.04.2, 21.04.3, 21.10.1

Exploit prediction

1.33% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • bugs.launchpad.net https://bugs.launchpad.net/mahara/+bug/1942903 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 4.6 AV:N/AC:H/Au:S/C:P/I:P/A:P

Classification

Weakness
  • CWE-78 Improper Neutralization of Special Elements used in an OS Command

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.