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CVE-2018-15596

MediumPublished

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...

Published: Aug 28, 2018
Updated: Aug 5, 2024
Assigning CNA: mitre
Evidence observed: Sep 12, 2018

Primary CVSS

6.1/ 10Medium

nvd · CVSS 3.0

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS probability estimate

2.9%

Low · next 30 days

Percentile: 86.2%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

MyBB 1.8.17 - Cross-Site ScriptingExploit
0xB9 · php · Sep 12, 2018

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