CVE-2020-35240

Name: CVE-2020-35240
Creator: NVD / NIST
Published: 2020-12-30T15:15:13.027+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.8/10EPSS 1.02%

Last modified Jun 17, 2026

CVE-2020-35240 is a medium-severity vulnerability rated 4.8/10 on the CVSS scale. FluxBB 1.5.11 is affected by cross-site scripting (XSS in the Blog Content component. This vulnerability can allow an attacker to inject the XSS payload in "Blog Content" and each time any user will visit the blog, the XSS triggers and the attacker can able to steal the cookie according to the crafted payload.. EPSS estimates a 1.02% chance of exploitation in the next 30 days.

Description

FluxBB 1.5.11 is affected by cross-site scripting (XSS in the Blog Content component. This vulnerability can allow an attacker to inject the XSS payload in "Blog Content" and each time any user will visit the blog, the XSS triggers and the attacker can able to steal the cookie according to the crafted payload.

Metrics

CVSS 3.1

4.8/10

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

1.02%

58.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Fluxbb	Fluxbb	1.5.11

References

https://fluxbb.org/downloads/Vendor Advisory
https://github.com/hemantsolo/CVE-Reference/blob/main/CVE-2020-35240.mdExploit, Third Party Advisory
https://github.com/hemantsolo/CVE-Reference/issues/1Third Party Advisory
https://fluxbb.org/downloads/Vendor Advisory
https://github.com/hemantsolo/CVE-Reference/blob/main/CVE-2020-35240.mdExploit, Third Party Advisory
https://github.com/hemantsolo/CVE-Reference/issues/1Third Party Advisory

Timeline

Published: Dec 30, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-35240?

How severe is CVE-2020-35240?

CVE-2020-35240 has a CVSS score of 4.8/10 (MEDIUM severity). The EPSS model estimates a 1.02% probability of exploitation in the next 30 days.

How do I fix CVE-2020-35240?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-35240?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST