What’s Vulnerable › Vulnerabilities

CVE-2021-28940

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-04-02 · updated 2026-06-17
• Weakness: CWE-116

Description

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 products

• Magpierss Project Magpierss: 0.72

References

• https://github.com/kellan/magpierss/blob/04d2a88b97fdba5813d01dc0d56c772d97360bb5/extlib/Snoopy.class.inc#L660
• https://pastebin.com/kpzHKKJu
• https://www.exploit-db.com/exploits/49643
• https://github.com/kellan/magpierss/blob/04d2a88b97fdba5813d01dc0d56c772d97360bb5/extlib/Snoopy.class.inc#L660
• https://pastebin.com/kpzHKKJu
• https://www.exploit-db.com/exploits/49643

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