CVE-2025-70797: Cross Site Scripting vulnerability in Limesurvey v.6.15.20+251021 allows a remote attacker to execute arbitrar

Routine

MEDIUM 6.1DOWNGRADE

CVE-2025-70797 is a medium-severity flaw (CVSS 6.1) affecting limesurvey. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross Site Scripting vulnerability in Limesurvey v.6.15.20+251021 allows a remote attacker to execute arbitrary code via the Box[title] and box[url] parameters.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 80%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-04-09
Last modified	2026-10-15

Publisher (CNA): MITRE · Vendor: limesurvey

Last updated 2026-10-15 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-09 18:16 UTCPublished CVE record published
2026-10-15 12:10 UTCUpdated Record last modified

limesurvey limesurvey DOWNGRADE

Affected: 6.15.20 251021

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.15.20

1. Check installed version

apt-cache policy limesurvey || rpm -q limesurvey || limesurvey --version

2. No fixed release: DOWNGRADE to a release before 6.15.20 (Debian / Ubuntu)

apt-cache madison limesurvey sudo apt install limesurvey=<VERSION_BEFORE_6.15.20> sudo apt-mark hold limesurvey

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list limesurvey sudo dnf downgrade limesurvey-<VERSION_BEFORE_6.15.20> sudo dnf versionlock add limesurvey

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-70797?

limesurvey: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-70797 being exploited?

CVE-2025-70797 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-70797 affect?

CVE-2025-70797 affects limesurvey. Severity is medium (CVSS 6.1). Cross Site Scripting vulnerability in Limesurvey v.6.15.20+251021 allows a remote attacker to execute arbitrary code via the Box[title] and box[url] parameters.

How urgent is CVE-2025-70797?

Priority 31/100. Public exploit reference

Related CVEs

CVE-2025-63238 MEDIUM 6.1 UPGRADE A Reflected Cross-Site Scripting (XSS) affects LimeSurvey versions prior to 6.15.11+250909, due to the lack of
CVE-2025-56422 CRITICAL 9.8 UPGRADE A deserialization vulnerability in LimeSurvey before v6.15.0+250623 allows a remote attacker to execute arbitr
CVE-2025-56421 HIGH 7.5 UPGRADE SQL Injection vulnerability in LimeSurvey before v.6.15.4+250710 allows a remote attacker to obtain sensitive

References

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