THREATPORT/VULNERABILITY/CVE-2021-28940
CRITICAL SEVERITY

CVE-2021-28940

Magpierss vulnerability

CVSS
9.8
EPSS
3.3%
EPSS pct
87th
Exploited
No known
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.
Affected vendor
Magpierss Project
Affected product
Magpierss
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
  • CWE-116 — Improper Output Encoding
Published
2021-04-02

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 3.3% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 87% of all scored CVEs.

Check your external exposure to CVE-2021-28940

  • Confirm whether Magpierss Project Magpierss is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2021-28940.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-28940

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2021-28940 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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