CVE-2018-15596
The thread titles (within title elements of the generated XML documents) aren't sanitized, leading to XSS.
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 2.3%. Treat it as high on anything reachable from the internet.
Description
An issue was discovered in inc/class_feedgeneration.php in MyBB 1.8.17. On the forum RSS Syndication page, one can generate a URL such as http://localhost/syndication.php?fid=&type=atom1.0&limit=15. The thread titles (within title elements of the generated XML documents) aren't sanitized, leading to XSS.
- CVSS 3.0
- 6.1 MEDIUMCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 2.26% probability · 83th percentile
- Public exploits
- 1 in Exploit-DB · first 12 September 2018
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- mybb/mybb
- Source
- cve@mitre.org
EPSS 2.3% 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://blog.mybb.com/2018/08/22/mybb-1-8-18-released-security-maintenance-release/Vendor Advisory
- https://www.exploit-db.com/exploits/45393/Exploit, Third Party Advisory, VDB Entry
- https://blog.mybb.com/2018/08/22/mybb-1-8-18-released-security-maintenance-release/Vendor Advisory
- https://www.exploit-db.com/exploits/45393/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.