CVE-2018-16736
In the rcfilters plugin 2.1.6 for Roundcube, XSS exists via the _whatfilter and _messages parameters (in the Filters section of the settings).
Does this matter?
A public exploit is published in Exploit-DB, so the technical barrier is gone even though the severity is medium and EPSS is 2.6%. Treat it as high on anything reachable from the internet.
Description
In the rcfilters plugin 2.1.6 for Roundcube, XSS exists via the _whatfilter and _messages parameters (in the Filters section of the settings).
- CVSS 3.0
- 5.4 MEDIUMCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 2.60% probability · 85th percentile
- Public exploits
- 1 in Exploit-DB · first 19 September 2018
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- rcfilters project/rcfilters
- Source
- cve@mitre.org
EPSS 2.6% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- https://github.com/eagle00789/RC_Filters/issues/19Third Party Advisory
- https://github.com/roundcube/roundcubemail/issues/6437Third Party Advisory
- https://www.exploit-db.com/exploits/45437/Exploit, Third Party Advisory, VDB Entry
- https://github.com/eagle00789/RC_Filters/issues/19Third Party Advisory
- https://github.com/roundcube/roundcubemail/issues/6437Third Party Advisory
- https://www.exploit-db.com/exploits/45437/Exploit, Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.