What is CVE-2021-28940?

CVE-2021-28940 is a critical-severity vulnerability in Magpierss Project, classified under Improper Encoding or Escaping of Output. CVSS score: 9.8/10. Published 2021-04-02.

How severe is CVE-2021-28940?

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

Vulnerability in Magpierss Project

CVE-2021-28940

Because of a incorrect escaped exec command in MagpieRSS in 0.72 in the /extlib/Snoopy.class.inc file, it is possible to add a extra command to the curl binary. This creates an issue on the /scripts/magpie_debug.php and /scripts/magpie_simple.php page that if you send a specific https url in the RSS URL field, you are able to execute arbitrary commands.

EPSS: 0.033 (87.2th percentile) — read the EPSS interpretation.

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.

Affected products

Magpierss_project Magpierss — versions 0.72
N/a — versions n/a

Weakness classification (CWE)

CWE-116 — Improper Encoding or Escaping of Output

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)
cve@mitre.org (Third Party Advisory, x_refsource_MISC)
cve@mitre.org (Exploit, VDB Entry, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-28940?: CVE-2021-28940 is a critical-severity vulnerability in Magpierss Project, classified under Improper Encoding or Escaping of Output. CVSS score: 9.8/10. Published 2021-04-02.
How severe is CVE-2021-28940?: Critical severity. CVSS v3 base score is 9.8 out of 10.