Critical severity · published Apr 2, 2021
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
9.8
CVSS
3.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.3% · higher than 88% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
Magpierss · Magpierss Project
0.72 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-28940
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-28940
Third Party Advisory
https://github.com/kellan/magpierss/blob/04d2a88b97fdba5813d01dc0d56c772d97360bb5/extlib/Snoopy.class.inc#L660
Exploit
https://pastebin.com/kpzHKKJu
Exploit
https://www.exploit-db.com/exploits/49643
More from Magpierss
5.3
CVE-2021-28941
Because of no validation on a curl command in MagpieRSS 0.72 in the /extlib/Snoopy.class.inc file, when you send a request to the /scripts/magpie_debug.php or…