How severe is CVE-2026-40353?

CVE-2026-40353 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-40353 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-40353?

CVE-2026-40353 affects Wger. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-40353?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-40353 have an EU (EUVD) identifier?

Yes. CVE-2026-40353 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23561.

When was CVE-2026-40353 published?

CVE-2026-40353 was published on 2026-04-17 and last updated on 2026-06-17.

CVE-2026-40353

CVE-2026-40353 is a medium-severity vulnerability in Wger with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v4: 5.1
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-23561
Weakness: CWE-79
Affected product: Wger
Published: 2026-04-17
Last modified: 2026-06-17

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.

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.
How severe is CVE-2026-40353?: CVE-2026-40353 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-40353 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-40353?: CVE-2026-40353 affects Wger. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-40353?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-40353 have an EU (EUVD) identifier?: Yes. CVE-2026-40353 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23561.
When was CVE-2026-40353 published?: CVE-2026-40353 was published on 2026-04-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:wger:wger:*:*:*:*:*:*:*:*

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