How severe is CVE-2025-26153?

CVE-2025-26153 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-2025-26153 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-26153?

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

Does CVE-2025-26153 have an EU (EUVD) identifier?

Yes. CVE-2025-26153 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-11540.

When was CVE-2025-26153 published?

CVE-2025-26153 was published on 2025-04-16 and last updated on 2026-06-17.

CVE-2025-26153

CVE-2025-26153 is a medium-severity vulnerability 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)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-11540
Weakness: CWE-79
Published: 2025-04-16
Last modified: 2026-06-17

Description

A Stored XSS vulnerability exists in the message compose feature of Chamilo LMS 1.11.28. Attackers can inject malicious scripts into messages, which execute when victims, such as administrators, reply to the message.

Frequently asked questions

What is CVE-2025-26153?: A Stored XSS vulnerability exists in the message compose feature of Chamilo LMS 1.11.28. Attackers can inject malicious scripts into messages, which execute when victims, such as administrators, reply to the message.
How severe is CVE-2025-26153?: CVE-2025-26153 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-2025-26153 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-26153?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-26153 have an EU (EUVD) identifier?: Yes. CVE-2025-26153 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-11540.
When was CVE-2025-26153 published?: CVE-2025-26153 was published on 2025-04-16 and last updated on 2026-06-17.

References

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