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Fencer Intel
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 5y ago modified 4mo 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

Is CVE-2021-43266 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Exploit prediction

1.33% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-09).

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 Intel 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.