CVE-2021-31676: A reflected XSS was discovered in PESCMS-V2.3.3

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MEDIUM 6.1DOWNGRADE

CVE-2021-31676 is a medium-severity flaw (CVSS 6.1) affecting pescms team. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A reflected XSS was discovered in PESCMS-V2.3.3. When combined with CSRF in the same file, they can cause bigger destruction.

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	0.9% (top 41%)
CISA exploited list	No
Weakness	CWE-79
Published	2022-07-06
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: pescms

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

Am I affected?

Timeline

2022-07-06 13:15 UTCPublished CVE record published
2026-06-17 03:52 UTCUpdated Record last modified

pescms pescms team DOWNGRADE

Affected: 2.3.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.3.3

1. Check installed version

apt-cache policy pescms-team || rpm -q pescms-team || pescms-team --version

2. No fixed release: DOWNGRADE to a release before 2.3.3 (Debian / Ubuntu)

apt-cache madison pescms-team sudo apt install pescms-team=<VERSION_BEFORE_2.3.3> sudo apt-mark hold pescms-team

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

dnf --showduplicates list pescms-team sudo dnf downgrade pescms-team-<VERSION_BEFORE_2.3.3> sudo dnf versionlock add pescms-team

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-2021-31676?

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

Is CVE-2021-31676 being exploited?

CVE-2021-31676 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-2021-31676 affect?

CVE-2021-31676 affects pescms team. Severity is medium (CVSS 6.1). A reflected XSS was discovered in PESCMS-V2.3.3. When combined with CSRF in the same file, they can cause bigger destruction.

How urgent is CVE-2021-31676?

Priority 41/100. Public exploit reference

Related CVEs

CVE-2021-31679 MEDIUM 6.5 DOWNGRADE An issue was discovered in PESCMS-V2.3.3
CVE-2021-31678 MEDIUM 6.5 DOWNGRADE An issue was discovered in PESCMS-V2.3.3
CVE-2021-31677 MEDIUM 6.5 DOWNGRADE An issue was discovered in PESCMS-V2.3.3
CVE-2020-28092 MEDIUM 6.1 DOWNGRADE PESCMS Team 2.3.2 has multiple reflected XSS via the id parameter:?g=Team&m=Task&a=my&status=3&id=,?g=Team&m=T

References

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