cbcvebase.
CVE-2018-7700
published 2018-03-27

CVE-2018-7700: DedeCMS 5.7 has CSRF with an impact of arbitrary code execution, because the partcode parameter in a tag_test_action.php request can specify a runphp field in…

PriorityP184high8.8CVSS 3.0
AVNACLPRNUIRSUCHIHAH
ITWEXPLOITVulnCheck KEV
Exploited in the wild
EPSS
74.84%
99.4th percentile
DedeCMS 5.7 has CSRF with an impact of arbitrary code execution, because the partcode parameter in a tag_test_action.php request can specify a runphp field in conjunction with PHP code.

Affected

1 ranges
VendorProductVersion rangeFixed in
dedecmsdedecms

Detection & IOCsextracted from sources · hover to see the quote

path/tag_test_action.php
url{{BaseURL}}/tag_test_action.php?url=a&token=&partcode={dede:field%20name=%27source%27%20runphp=%27yes%27}echo%20md5%28%22CVE-2018-7700%22%29%3B{/dede:field}
  • Look for GET requests to tag_test_action.php containing a 'partcode' parameter with 'runphp=yes' — this is the exploitation vector for CSRF-triggered RCE.
  • Probe responses containing the MD5 string '4cc32a3a81d2bb37271934a48ce4468a' (md5('CVE-2018-7700')) with HTTP 200 confirm successful RCE via the runphp tag injection.
  • Shodan/FOFA fingerprinting: identify exposed DedeCMS instances via 'http.html:"dedecms"' or 'body="dedecms"' before probing for the vulnerability.
  • ·The exploit requires the victim (authenticated admin) to follow a crafted link or be subjected to a CSRF trigger — the token parameter is left empty in the PoC, suggesting token validation is absent or bypassable in DedeCMS 5.7SP2.

CVSS provenance

nvdv3.08.8HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
nvdv2.06.8MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:P
vulncheck8.8HIGH
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