CVE-2026-40353

Description

wger is a free, open-source workout and fitness manager. In versions 2.5 and below, the attribution_link property in AbstractLicenseModel constructs HTML by directly interpolating user-controlled license fields (such as license_author) without escaping, and templates render the result using Django's |safe filter. An authenticated user can create an ingredient with a malicious license_author value containing JavaScript, which executes in the browser of any visitor viewing the ingredient page, resulting in stored XSS. This issue has been fixed in version 2.5.

CVSS v3.1 Score

5.4

MEDIUM

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

EPSS — Exploit Prediction

0.0001

Probability of exploitation

0.02%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

Affected Products

Vendor	Product	Versions
wger	wger	< 2.5

References

Advisories & Patches

https://github.com/wger-project/wger/security/advisories/GHSA-6f54-qjvm-wwq3 https://github.com/wger-project/wger/security/advisories/GHSA-6f54-qjvm-wwq3

Exploits

https://github.com/wger-project/wger/security/advisories/GHSA-6f54-qjvm-wwq3 https://github.com/wger-project/wger/security/advisories/GHSA-6f54-qjvm-wwq3

Other References

https://github.com/wger-project/wger/releases/tag/2.5

Frequently Asked Questions

What is CVE-2026-40353? +

wger is a free, open-source workout and fitness manager. In versions 2.5 and below, the attribution_link property in AbstractLicenseModel constructs HTML by directly interpolating user-controlled license fields (such as license_author) without escaping, and templates render the result using Django's |safe filter. An authenticated user can create an ingredient with a malicious license_author value containing JavaScript, which executes in the browser of any visitor viewing the ingredient page, resulting in stored XSS. This issue has been fixed in version 2.5. It has a CVSS v3.1 base score of 5.4 (MEDIUM).

How severe is CVE-2026-40353? +

CVE-2026-40353 has a CVSS v3.1 score of 5.4 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0001, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-40353? +

CVE-2026-40353 affects products from wger, specifically: wger. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-40353? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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