CVE-2020-25915: Cross Site Scripting (XSS) vulnerability in UserController.php in ThinkCMF version 5.1.5, allows attackers to

Routine

MEDIUM 5.4DOWNGRADE

CVE-2020-25915 is a medium-severity flaw (CVSS 5.4) affecting thinkcmf. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross Site Scripting (XSS) vulnerability in UserController.php in ThinkCMF version 5.1.5, allows attackers to execute arbitrary code via crafted user_login.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.4% (top 62%)
CISA exploited list	No
Weakness	CWE-79
Published	2023-08-11
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: thinkcmf

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

Am I affected?

Timeline

2023-08-11 14:15 UTCPublished CVE record published
2026-06-17 03:07 UTCUpdated Record last modified

thinkcmf thinkcmf DOWNGRADE

Affected: 5.1.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.1.5

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 5.1.5 (Debian / Ubuntu)

apt-cache madison thinkcmf sudo apt install thinkcmf=<VERSION_BEFORE_5.1.5> sudo apt-mark hold thinkcmf

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

dnf --showduplicates list thinkcmf sudo dnf downgrade thinkcmf-<VERSION_BEFORE_5.1.5> sudo dnf versionlock add thinkcmf

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-2020-25915?

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

Is CVE-2020-25915 being exploited?

CVE-2020-25915 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-2020-25915 affect?

CVE-2020-25915 affects thinkcmf. Severity is medium (CVSS 5.4). Cross Site Scripting (XSS) vulnerability in UserController.php in ThinkCMF version 5.1.5, allows attackers to execute arbitrary code via crafted user_login.

How urgent is CVE-2020-25915?

Priority 28/100. No elevated risk signals yet.

Software pages

PHP vulnerabilities

Related CVEs

CVE-2022-40849 MEDIUM 5.4 DOWNGRADE ThinkCMF version 6.0.7 is affected by Stored Cross-Site Scripting (XSS)
CVE-2022-40489 HIGH 8.8 DOWNGRADE ThinkCMF version 6.0.7 is affected by a Cross Site Request Forgery (CSRF) vulnerability that allows a Super Ad
CVE-2021-40616 MEDIUM 6.5 DOWNGRADE thinkcmf v5.1.7 has an unauthorized vulnerability

References

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