CVE-2020-13870: An issue was discovered in the Comments plugin before 1.5.5 for Craft CMS

Q: How do I fix CVE-2020-13870?

comments: upgrade to 1.5.5. Exact commands for each OS are on this page.

Q: Is CVE-2020-13870 being exploited?

CVE-2020-13870 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-13870 affect?

CVE-2020-13870 affects comments. Severity is medium (CVSS 5.4). An issue was discovered in the Comments plugin before 1.5.5 for Craft CMS. There is stored XSS via an asset volume name.

Q: How urgent is CVE-2020-13870?

Priority 30/100. No elevated risk signals yet.

Routine

MEDIUM 5.4UPGRADE

CVE-2020-13870 is a medium-severity flaw (CVSS 5.4) affecting comments. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in the Comments plugin before 1.5.5 for Craft CMS. There is stored XSS via an asset volume name.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.5% (top 55%)
CISA exploited list	No
Weakness	CWE-79
Published	2020-06-05
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: verbb

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-06-05 19:15 UTCPublished CVE record published
2026-06-17 02:53 UTCUpdated Record last modified

verbb comments UPGRADE

Affected: < 1.5.5

Fixed in: 1.5.5

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 1.5.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade comments

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade comments

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2020-13870?

comments: upgrade to 1.5.5. Exact commands for each OS are on this page.

Is CVE-2020-13870 being exploited?

CVE-2020-13870 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-2020-13870 affect?

CVE-2020-13870 affects comments. Severity is medium (CVSS 5.4). An issue was discovered in the Comments plugin before 1.5.5 for Craft CMS. There is stored XSS via an asset volume name.

How urgent is CVE-2020-13870?

Priority 30/100. No elevated risk signals yet.

Related CVEs

CVE-2020-13869 MEDIUM 5.4 UPGRADE An issue was discovered in the Comments plugin before 1.5.6 for Craft CMS
CVE-2020-13868 MEDIUM 6.5 UPGRADE An issue was discovered in the Comments plugin before 1.5.5 for Craft CMS
CVE-2008-0773 HIGH 7.5 UPGRADE UPGRADE SQL injection vulnerability in Phil Taylor Comments (com_comments, aka Review Script) 0.5.8.5g and earlier com

References

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